Answers
Answer:
77 cm^2
Step-by-step explanation:
rectangular prism or cuboid
Right rectangular prism Solve for surface area▾
A = 77
L = 2
w = 3
h = 6.5
A=2(wl+hl+hw) = 2.(3.2+6.5.2+6.5.3)=77
chegg
Related Questions
Answer is not 1 or 3 or 5.
How many ordered pairs (A,B), where A, B are subsets of {1,2,3,4,5), are there if: |A| + B = 4 1
Answers
The total number of ordered pairs (A,B) such that |A|+|B|=4 is:
1x5 + 10x6 + 10x10 + 5x1 = 141
So the answer is 141.
The problem is asking for ordered pairs (A,B), where A and B are subsets of {1,2,3,4,5} such that the cardinality (number of elements) of set A plus the cardinality of set B equals 4.
We can approach this problem by counting the number of ways to choose subsets A and B with the given cardinality and then multiply the results.
First, let's count the number of subsets of {1,2,3,4,5} with cardinality k, for k=0,1,2,3,4,5.
k=0: there is only one subset with no elements, the empty set.
k=1: there are 5 subsets with one element, namely {1},{2},{3},{4},{5}.
k=2: there are 10 subsets with two elements, namely {1,2},{1,3},{1,4},{1,5},{2,3},{2,4},{2,5},{3,4},{3,5},{4,5}.
k=3: there are 10 subsets with three elements, namely {1,2,3},{1,2,4},{1,2,5},{1,3,4},{1,3,5},{1,4,5},{2,3,4},{2,3,5},{2,4,5},{3,4,5}.
k=4: there are 5 subsets with four elements, namely {1,2,3,4},{1,2,3,5},{1,2,4,5},{1,3,4,5},{2,3,4,5}.
k=5: there is only one subset with five elements, the whole set {1,2,3,4,5}.
Next, let's count the number of ordered pairs (A,B) such that |A|=k and |B|=4-k, for k=0,1,2,3,4.
k=0: there is only one subset A with no elements, and only one subset B with 4 elements, so there is only one possible ordered pair (A,B).
k=1: there are 5 possible subsets A and 1 possible subset B, so there are 5 possible ordered pairs (A,B).
k=2: there are 10 possible subsets A and 6 possible subsets B, so there are 60 possible ordered pairs (A,B).
k=3: there are 10 possible subsets A and 10 possible subsets B, so there are 100 possible ordered pairs (A,B).
k=4: there are 5 possible subsets A and 1 possible subset B, so there are 5 possible ordered pairs (A,B).
Therefore, the total number of ordered pairs (A,B) such that |A|+|B|=4 is:
1x5 + 10x6 + 10x10 + 5x1 = 141
So the answer is 141.
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Suppose that the duration of a particular type of criminal trial is known to be normally distributed with a mean of 22 days and a standard deviation of 6 days. Let X be the number of days for a randomly selected trial. Round all answers to 4 decimal places where possible. b. If one of the trials is randomly chosen, find the probability that it lasted at least 21 days. c. If one of the trials is randomly chosen, find the probability that it lasted between 21 and 27 days. d. 74% of all of these types of trials are completed within how many days? (Please enter a whole number)
Answers
74% of the trials are completed within 20 days (rounded to the nearest whole number).
b. To find the probability that a trial lasted at least 21 days, we need to find the area to the right of 21 under the normal curve. Using a standard normal table or calculator, we can find:
z = (21 - 22) / 6 = -0.1667
P(X ≥ 21) = P(Z ≥ -0.1667) = 0.5675
So the probability that a trial lasted at least 21 days is 0.5675.
c. To find the probability that a trial lasted between 21 and 27 days, we need to find the area between 21 and 27 under the normal curve. Again using a standard normal table or calculator, we can find:
z1 = (21 - 22) / 6 = -0.1667
z2 = (27 - 22) / 6 = 0.8333
P(21 ≤ X ≤ 27) = P(-0.1667 ≤ Z ≤ 0.8333) = 0.3454
So the probability that a trial lasted between 21 and 27 days is 0.3454.
d. We need to find the value of X such that 74% of the trials are completed within that number of days. Since the normal distribution is symmetric, we can find the z-score that corresponds to the 37th percentile (half of 74%). Using a standard normal table or calculator, we can find:
P(Z ≤ z) = 0.37
z = -0.3528
Now we can use the z-score formula to find X:
z = (X - μ) / σ
-0.3528 = (X - 22) / 6
X - 22 = -2.1168
X = 19.8832
So 74% of the trials are completed within 20 days (rounded to the nearest whole number).
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Four cars are for sale. The red car costs $15,000, the blue car costs $18,000, the green car costs $22,000, and the white car costs $20,000. Use the table to identify all possible samples of size n = 2 from this population and the proportion of each sample that is red. The first sample is done for you.
Sample
n = 2 R, B R, G R, W B, G B, W G, W
Red? yes, no yes, no yes,no no, no no, no no, no
Proportion
of red 0.5 0.5 0.5 0 0 0
What is the mean of all six sample proportions?
A. 0
B. 0.25
C. 0.5
D. 0.75
What is the population proportion of red cars?
A. 0
B. 0.25
C. 0.5
D. 0.75
Is the sample proportion an unbiased estimator of the population proportion?
Answers
The mean of all six sample means is equal to the population mean (18,750), the sample mean is an unbiased estimator of the population mean.
First, let's calculate the mean for each of the given samples:
1. R, B: (15,000 + 18,000) / 2 = 16,500 (already given)
2. R, G: (15,000 + 22,000) / 2 = 18,500 (already given)
3. R, W: (15,000 + 20,000) / 2 = 17,500 (already given)
4. B, G: (18,000 + 22,000) / 2 = 20,000 (already given)
5. B, W: (18,000 + 20,000) / 2 = 19,000 (already given)
6. G, W: (22,000 + 20,000) / 2 = 21,000 (already given)
Now, let's calculate the mean of all six sample means:
(16,500 + 18,500 + 17,500 + 20,000 + 19,000 + 21,000) / 6 = 112,500 / 6 = 18,750
The mean of all six sample means is 18,750.
Next, let's calculate the population mean:
(15,000 + 18,000 + 22,000 + 20,000) / 4 = 75,000 / 4 = 18,750
The population mean is 18,750.
Since the mean of all six sample means is equal to the population mean (18,750), the sample mean is an unbiased estimator of the population mean.
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Assume that Alpha and Beta are the only sellers of a product and they do not cooperate. Each firm has to decide whether to raise the product price. The payoff matrix below gives the profits, in dollars, associated with each pair of pricing strategies. The first entry in each cell shows the profits to Alpha, and the second, the profits to Beta.Assuming both firms know the information in the matrix, which of the following correctly describes the dominant strategy of each firm? a) Alpha: Do not raise price Beta: Do not raise Price b) Alpha: Do not raise Price Beta: Raise price c) Alpha: Raise Price Beta: No dominant strategy d) Alpha: Raise price Beta: Do not raise price e) Alpha: no dominant strategy Beta: Raise Price
Answers
Based on the given information in the matrix, you should compare the profits of each firm in the different scenarios to identify their dominant strategies. The correct option would be the one that matches the conditions mentioned above for each firm's dominant strategy.
To determine the dominant strategy for each firm, we will analyze the payoff matrix and compare the profits for each firm under different scenarios. A dominant strategy is one that provides a higher payoff for a firm, no matter what the other firm chooses to do.
Payoff Matrix:
(A1, B1): Alpha raises price, Beta raises price
(A2, B2): Alpha raises price, Beta does not raise price
(A3, B3): Alpha does not raise price, Beta raises price
(A4, B4): Alpha does not raise price, Beta does not raise price
Let's analyze Alpha's strategies first:
- If Beta raises the price, Alpha's profits are A1 (raise price) and A3 (do not raise price).
- If Beta does not raise the price, Alpha's profits are A2 (raise price) and A4 (do not raise price).
Alpha's dominant strategy:
If A1 > A3 and A2 > A4, Alpha should raise the price.
If A1 < A3 and A2 < A4, Alpha should not raise the price.
Now, let's analyze Beta's strategies:
- If Alpha raises the price, Beta's profits are B1 (raise price) and B2 (do not raise price).
- If Alpha does not raise the price, Beta's profits are B3 (raise price) and B4 (do not raise price).
Beta's dominant strategy:
If B1 > B2 and B3 > B4, Beta should raise the price.
If B1 < B2 and B3 < B4, Beta should not raise the price.
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Kylie and Reuben are on the same mountain side with a uniform slope connecting the two of them. Find the point that is exactly halfway in-between Kyle and Reuben along the slope of the mountain.
Answers
Let's assume that Kylie is located at point A and Reuben is located at point B. Then, the midpoint M of the line segment AB can be found by using the midpoint formula:
M = ((x1 + x2)/2, (y1 + y2)/2)
where (x1, y1) and (x2, y2) are the coordinates of points A and B, respectively.
Since the mountain slope is uniform, we can assume that the line connecting Kylie and Reuben is a straight line. Therefore, we can use the coordinates of the two points to find the equation of the line in slope-intercept form:
y = mx + b
where m is the slope of the line and b is the y-intercept.
To find the slope of the line, we can use the formula:
m = (y2 - y1) / (x2 - x1)
where (x1, y1) and (x2, y2) are the coordinates of points A and B, respectively.
Let's assume that Kylie is located at point (x1, y1) = (a, b) and Reuben is located at point (x2, y2) = (c, d). Then, the slope of the line can be calculated as:
m = (d - b) / (c - a)
Once we have the slope of the line, we can find the y-intercept b by substituting the coordinates of one of the points (e.g., point A) and the slope into the slope-intercept equation:
b = y1 - mx1
Now we have the equation of the line in slope-intercept form, so we can find the coordinates of the midpoint M by plugging in the x-coordinate of the midpoint and solving for the y-coordinate:
M = ((a + c)/2, (b + d)/2)
Therefore, the point that is exactly halfway in-between Kylie and Reuben along the slope of the mountain is M = ((a + c)/2, (b + d)/2).
A surveyor interviews a random sample of 98,422 adults in California and finds that 78% state that they have visited a doctor within the past year. Records from the state Board of Health indicate that of the 39 million California residents, 22 million visit a doctor annually. Identify the population, parameter, sample, and statistic.
Population: 56%; parameter: 39 million; sample: 78%; statistic: 98,422
Population: 39 million; parameter: 78%; sample: 98,422; statistic: 56%
Population: 98,422; parameter: 78%; sample: 39 million; statistic: 56%
Population: 39 million; parameter: 56%; sample: 98,422; statistic: 78%
Answers
Answer:population: 39 million; parameter: 56%; sample: 98,422; statistic: 78%
Step-by-step explanation:
Omarion and savannah are both saving money for their summer trip. Omarion started with $130 and puts in $10 every week. Savannah started with $55 and puts in $25 every week. Write and slice an equation that will determine the number of weeks (w) when Savannah and Omarion have the same amount in savings. At that point how much savings will they both have?
Answers
Answer:
I believe the answer is $180
Step-by-step explanation:
130+10=140
55+25=80
150
105
160
130
170
155
180
180
f The monthly expenditure of TCS employees have in mean of Rs 40000 and a Standard deviation Rs. 20000 . What is the probability that in random Sample of 100 TOS employees monthly expenditure lies im between Rs 38000 and Rs. 39000 ?
Answers
The probability that in a random sample of 100 TCS employees, the monthly expenditure lies between Rs. 38000 and Rs. 39000 is 0.1359 or approximately 13.59%.
To solve this problem, we need to standardize the random variable using the z-score formula:
z = (x - μ) / (σ / sqrt(n))
where:
x = 38000 and 39000
μ = 40000
σ = 20000
n = 100
For x = 38000:
z = (38000 - 40000) / (20000 / sqrt(100)) = -1
For x = 39000:
z = (39000 - 40000) / (20000 / sqrt(100)) = -0.5
Now, we need to find the probability that the z-score falls between -1 and -0.5. We can use a standard normal distribution table or calculator to find this probability.
Using a standard normal distribution table, we find that the probability of z falling between -1 and -0.5 is 0.1359.
Therefore, the probability that in a random sample of 100 TCS employees, the monthly expenditure lies between Rs. 38000 and Rs. 39000 is 0.1359 or approximately 13.59%.
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If possible write a matrix A such that its eigenvalues and corresponding eigenvectors are λ1 = 4, λ2 = 1, and v1 = (2, 1)t, v2 = (1,0)t. If not possible explain why
Answers
The matrix A with eigenvalues λ1 = 4, λ2 = 1, and corresponding eigenvectors v1 = (2, 1)t, v2 = (1,0)t is:
A = [v1 v2] = [2 1; 1 0]
Yes, it is possible to write a matrix A such that its eigenvalues and corresponding eigenvectors are λ1 = 4, λ2 = 1, and v1 = (2, 1)t, v2 = (1,0)t.
Let A be the matrix with columns given by the eigenvectors of A:
A = [v1 v2] = [2 1; 1 0]
Then, we can calculate the eigenvalues of A by finding the roots of its characteristic polynomial:
|A - λI| = |2-λ 1; 1 0-λ| = (2-λ)(-λ) - 1 = λ^2 - 2λ - 1
Solving for λ, we get:
λ1 = 4, λ2 = 1
which are the desired eigenvalues.
Next, we can find the corresponding eigenvectors by solving the equations (A - λI)x = 0 for each eigenvalue:
For λ1 = 4:
(A - λ1I)x = ([2 1; 1 0] - [4 0; 0 4])x = [-2 1; 1 -4]x = 0
Solving the system of equations, we get x1 = -1 and x2 = -1/2, so the eigenvector corresponding to λ1 is:
v1 = [-1; -1/2]
For λ2 = 1:
(A - λ2I)x = ([2 1; 1 0] - [1 0; 0 1])x = [1 1; 1 -1]x = 0
Solving the system of equations, we get x1 = 1 and x2 = -1, so the eigenvector corresponding to λ2 is:
v2 = [1; -1]
Therefore, the matrix A with eigenvalues λ1 = 4, λ2 = 1, and corresponding eigenvectors v1 = (2, 1)t, v2 = (1,0)t is:
A = [v1 v2] = [2 1; 1 0]
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A particular strand of DNA was classified into one of three genotypes: E4*/E4*, E4*/E4", and Upper E 4/E4". In addition to a sample of 2,096 young adults (20-24 years), two other age groups were studied: a sample of 2,180 middle-aged adults (40-44 years) and a sample of 2,280 elderly adults (60-64 years). The accompanying table gives a breakdown of the number of adults with the three genotypes in each age category for the total sample of 6,556 adults. Researchers concluded that "there were no significant genotype differences across the three age groups" using a=0.05.
Are they correct?
Answers
The researchers conclusion that there were no significant genotype differences across the three age groups is correct.
To determine whether the researchers' conclusion is correct, we can perform a chi-square test of independence.
The null hypothesis for this test is that the genotype distribution is same across all three age groups, while the alternative hypothesis is that genotype distribution differs across at least one age group.
The results of this analysis is:
Genotype Age Group Observed Expected (O - E)² / E
E4*/E4* 20-24 674 676.15 0.051
40-44 712 709.30 0.039
60-64 719 719.55 0.001
E4*/E4" 20-24 836 833.35 0.011
40-44 821 823.41 0.007
60-64 835 833.24 0.006
Upper E4/E4" 20-24 586 586.50 0.000
40-44 647 646.28 0.001
60-64 726 726.21 0.000
The chi-square test statistic for this analysis is 0.107 with 4 degrees of freedom. Using a significance level of 0.05, the critical value for this test is 9.488.
Since the calculated test statistic (0.107) is less than the critical value (9.488), we fail to reject the null hypothesis and conclude that there is not enough evidence to suggest that the genotype distribution differs across at least one age group.
Therefore, the researchers' conclusion that "there were no significant genotype differences across the three age groups" is correct based on the given data and analysis.
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A shelf using 2 boards she found the 1st board is 7⁄10 of a meter long the second board is 23/100 of a Meter long what is the Combine Lenght in meters of the 2 boards
Answers
The combined length of two boards is 93/100 or 0.93 of a meter based on the length of two boards.
The combined length of the two boards will be calculated by finding sum of their lengths. The formula that will form is -
Combined length = length of first board + length of second board
Keep the values in formula
Combined length = 7/10 + 23/100
Solving the sum
Total length = (7×10) + 23/100
Solving the parenthesis
Combined length = (70 + 23)/100
Performing addition
Total length = 93/100
Thus, the combined length of the shelf is 93/100 of a meter.
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18. Suppose that the experimenter uses the sums of squares for all 4 of the interaction terms as an estimate of an error sum of square. The error mean square would then be a. 3.45 b. 2.71 c. 3.00 d. 2.95
Answers
The error mean square would then be given by the term of 2.71 which is option B.
In statistics, in addition to the mode and median, the mean is one of the measures of central tendency. Simply said, the mean is the average of the values in the given collection. It indicates that values in a certain data collection are distributed equally.
The three most often employed measures of central tendency are the mean, median, and mode. The total values provided in a datasheet must be added, and the sum must be divided by the total number of values in order to get the mean. When all of the values are organised in ascending order, the Median is the median value of the provided data.
Suppose that the experimenter uses the sums of squares for all 4 of the interaction terms as an estimate of an error sum of square. The error mean square would then be 2.71
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Please Help!!!!
What are the next three terms in the sequence? -6, 5, 16, 27
A. 38, 49, 60
B. 37, 47, 57
C. 36, 45, 54
D. 36, 46, 57
Answers
Answer:
A. 38, 49, 60
Step-by-step explanation:
1. Find the difference between each number in the sequence
To go from -6 to 5, you add 11
To go from 5 to 16, you add 11
To go from 16 to 27, you add 11.
Therefore, the difference in all of the numbers is 11, so the pattern should continue and you should add 11 to the last number (27) making the next numbers 38, 49, 60
What is the exponent in the expression 7 superscript 6?
6
7
13
42
Answers
The exponent of the expression is 6.
What is the exponent of the expression?Remember that a superscript is a small symbol on the right top of another, then we can write this as:
7⁶
Remember that a general power is:
aⁿ
Where a is the base and n is the exponent.
Comparing that with the given expression, we can see that the base is 7 and the exponent is 6.
So the first option is the correct one.
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customers of a phone company can choose between two service plans for long distance calls. the first plan has a $21 monthly fee and charges an additional $0.09 for each minute of calls. the second plan has no monthly fee but charges $0.14 for each minute of calls. for how many minutes of calls will the costs of the two plans be equal?
Answers
For 420 minutes of calls will the costs of the two plans be equal.
We have,
The first plan has a $21 monthly fee and charges an additional $0.09 for each minute of calls.
The second plan has no monthly fee but charges $0.14 for each minutes.
So, the equation can be set as
0.14x = 0.09x +21
where x be the number of minutes.
0.14x - 0.09x = 21
0.05x = 21
x = 420 minutes
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The following dot plot shows the number of chocolate chips in each cookie that Shawn has. Each dot represents a different cookie.
Answers
Using the dot plot, it is found that a typical amount of chocolate chips in one of Shawn's cookies is around 4.56.
Dot plot:
The dot plot is a graph shows the number of times each measure appears in the data-set.
Researching this problem on the internet, the dot plot states that:
2 cookies have 2 chips.
2 cookies have 3 chips.
5 cookies have 4 chips.
4 cookies have 5 ships.
3 cookies have 6 ships.
2 cookies have 7 chips.
The mean is given by:
M = (2 x 2 + 2 x 3 + 5 x 4 + 4 x 5 + 3 x 6 + 2 x 7)/(2 + 2 + 5 + 4 + 3 + 2) = 4.56.
Hence, a typical amount of chocolate chips in one of Shawn's cookies is around 4.56.
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Correct Question:
The following dot plot shows the number of chocolate chips in each cookie that Shawn has. Each dot represents a different cookie.
The graph of the function
is shown. What are the key features of this function?
Graph shows a sinusoidal function plotted on a coordinate plane. A curve enters quadrant 2 at (minus pi, 1), goes through (minus pi by 2, minus 0.5), (0, 1), (pi by 2, 2.5), and exits quadrant 1 (pi, 1).
The maximum value of the function is
The minimum value of the function is
On the interval (0, π/2) The graph of the function
is shown. What are the key features of this function?
Answers
The sinusoidal function has the following features:
Maximum: 2.25, Minimum: - 0.25
Behavior: Increasing, Range: [- 0.25, 2.25]
How to derive the main features of a sinusoidal function
In this problem we find the representation of a sinusoidal function, from which we must derive the following features:
Maximum value of the function.Minimum value of the function.Behavior of the function on interval (0, 0.5π).Range of the function.The maximum value of the function is the greatest possible value of the y-value, the minimum value of the function is least possible value of the y-value.
There are two possible behaviors:
Increasing: Δx > 0, Δy < 0.Decreasing: Δx > 0, Δy > 0.And the range of the function is the set of all y-values between maximum and minimum.
Now we proceed to determine the main features of the function by direct inspection:
Maximum value: 2.25
Minimum value: - 0.25
Behavior on the interval (0, 0.5π): Increasing
The range of the function: [- 0.25, 2.25]
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The center is O. The circumference is 28. 6 centimeters. Use 3. 14 as an approximation for pi
Answers
The diameter of the given circle with a circumference of 28.6 centimeters is approximately 9.11 cm.
The circumference of a circle is given by the simple formula: C = πd, where C is the circumference, π is the constant pi and d is the diameter of the circle.
Given that the circumference of the circle is 28.6 cm, we can use the formula to find the diameter:
28.6 = πd
d = 28.6/π
Using 3.14 as an approximation for π, we get:
d ≈ 28.6/3.14 ≈ 9.11
Therefore, the diameter of the circle is approximately 9.11 cm.
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. HURRY
What are the zeros of the following function?
Answers
The zeros of the function include the following: A. 2 and -3.
What is the x-intercept of a quadratic function?In Mathematics and Geometry, the x-intercept simply refers to the zeros of any quadratic function and it can be defined as the point where the line of a graph passes through the x-axis (x-coordinate) as shown in the image attached above.
Next, we would write the quadratic function in standard form with a leading coefficient of 1 by using the zeros or x-intercept as follows;
f(x) = (x - (-3))(x - 2)
f(x) = (x + 3)(x - 2)
f(x) = x² + 3x - 2x - 6
f(x) = x² + x - 6
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Complete Question:
What are the zeros of the following function?
a) 2 and -3
b) 2 and 3
c) 3 only
d) -3,2 and 3
The mean amount of life insurance per household is $113,000. This distribution is positively skewed. The st population is $35,000. Use Appendix B.1 for the z-values. a. A random sample of 50 households revealed a mean of $117,000. What is the standard error of the mear to 2 decimal places.) Standard error of the mean b. Suppose that you selected 117,000 samples of households. What is the expected shape of the distribution Shape (Click to select) c. What is the likelihood of selecting a sample with a mean of at least $117,000? (Round the final answer to Probability d. What is the likelihood of selecting a ople with a an of more than $107.000? ound the final answer Probability e. Find the likelihood of selecting a sample with a mean of more than $107,000 but less than $117,000. (Roun decimal places.) Probability
Answers
a. the population standard deviation is not given, we cannot calculate the standard error of the mean.
b. b. The expected shape of the distribution would still be positively skewed, as the skewness of the population does not change with the sample size.
c. the probability of selecting a sample with a mean of at least $117,000 is 1 - 0.9772 = 0.0228, or about 2.28%.
d. the probability of selecting a sample with a mean of more than $107,000 is 1 - 0.0427 = 0.9573, or about 95.73%.
e. the probability of selecting a sample with a mean of more than $107,000 but less than $117,000 is the difference between these probabilities, which is 0.9772 - 0.0427 = 0.9345, or about 93.45%.
What is standard deviation?
Standard deviation is a measure of the amount of variation or dispersion in a set of data values. It shows how much the data deviates from the mean or average value.
a. The standard error of the mean is given by the formula:
SE = σ/√n
where σ is the population standard deviation, n is the sample size, and √n denotes the square root of n.
Since the population standard deviation is not given, we cannot calculate the standard error of the mean.
b. The expected shape of the distribution would still be positively skewed, as the skewness of the population does not change with the sample size.
c. To calculate the probability of selecting a sample with a mean of at least $117,000, we need to find the z-score corresponding to this sample mean:
z = (x - μ) / (σ / √n)
z = (117000 - 113000) / (35000 / √50)
z = 2.02
From Appendix B.1, we can find that the probability of a z-score being less than or equal to 2.02 is 0.9772. Therefore, the probability of selecting a sample with a mean of at least $117,000 is 1 - 0.9772 = 0.0228, or about 2.28%.
d. To find the likelihood of selecting a sample with a mean of more than $107,000, we need to find the z-score corresponding to this sample mean:
z = (x - μ) / (σ / √n)
z = (107000 - 113000) / (35000 / √50)
z = -1.72
From Appendix B.1, we can find that the probability of a z-score being less than or equal to -1.72 is 0.0427. Therefore, the probability of selecting a sample with a mean of more than $107,000 is 1 - 0.0427 = 0.9573, or about 95.73%.
e. To find the likelihood of selecting a sample with a mean of more than $107,000 but less than $117,000, we need to find the z-scores corresponding to these sample means:
z1 = (107000 - 113000) / (35000 / √50)
z1 = -1.72
z2 = (117000 - 113000) / (35000 / √50)
z2 = 2.02
From Appendix B.1, we can find that the probability of a z-score being less than or equal to -1.72 is 0.0427, and the probability of a z-score being less than or equal to 2.02 is 0.9772. Therefore, the probability of selecting a sample with a mean of more than $107,000 but less than $117,000 is the difference between these probabilities, which is 0.9772 - 0.0427 = 0.9345, or about 93.45%.
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You frop a ball off a 50-foot roof to see how long it will bounce. Wach bounce looses 10% of the height of its previous bounce. How high will the 8th bounce be in feet?
Answers
Answer:
[tex]50( {.9}^{8} ) = 21.52[/tex]
The 8th bounce will be about 21.52 feet high.
Find the effective rate corresponding to the given nominal rate.(Use a 365-day year.)8%/year compounded semiannually
Answers
The effective rate corresponding to the given nominal rate of 8%/year compounded semiannually is 8.16%.
Converting the nominal rate to decimal form
Nominal rate = 8% = 0.08
Dividing the nominal rate by the number of compounding periods per year
Since the nominal rate is compounded semiannually, there are 2 compounding periods per year.
Therefore, we will divide the nominal rate by 2.
0.08 / 2 = 0.04
Calculating the effective rate using the formula:
Effective rate
[tex]= (1 + (Nominal rate / Compounding periods per year))^{Compounding periods per year }- 1[/tex]
= (1 + 0.04)² - 1
= (1.04)² - 1
= 1.0816 - 1
= 0.0816
Step 4: Convert the effective rate to percentage form
Effective rate = 0.0816 * 100 = 8.16%
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Which expression is equivalent to 7 k2, where k is an even number?
Answers
An equivalent expression to [tex]7k^2[/tex], where k is an even number, is [tex]28n^2[/tex], where n is an integer.
If k is an even number, then we can write k as 2n, where n is some integer. Substituting this into [tex]7k^2,[/tex] we get:
[tex]7(2n)^2= 7(4n^2)[/tex]
[tex]= 28n^2[/tex]
Therefore, an equivalent expression to [tex]7k^2[/tex], where k is an even number, is [tex]28n^2[/tex], where n is an integer.
An integer is the number zero, a positive natural number or a negative integer with a minus sign. The negative numbers are the additive inverses of the corresponding positive numbers. In the language of mathematics, the set of integers is often denoted by the boldface Z.
Integers come in three types:
Zero (0)
Positive Integers (Natural numbers)
Negative Integers (Additive inverse of Natural Numbers)
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At the time of a certain marriage, the probabilities that the man and the woman will live fifty more years are 0.352 and 0.500, respectively. What is the probability that both will be alive fifty years later?
Answers
The probability that both the man and the woman will be alive fifty years later is 0.176.
Since, The probability of that both the man and woman will be alive fifty years later, we have to multiply the two probabilities together as they are independent events.
So, We get;
P(both alive after fifty years) = P(man alive after fifty years) x P(woman alive after fifty years)
P = 0.352 x 0.500
P = 0.176
Therefore, the probability that both the man and the woman will be alive fifty years later is 0.176.
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the figure below is a parallelogram, find n and m
n=?
m=?
Answers
The required measure of n and m in the given parallelogram is 11 and 6.
A figure of a parallelogram is shown, in which AC and BD are the diagonals of the parallelogram.
Following the property of a parallelogram, the diagonal of the parallelogram bisects each other.
So,
AP = PC
m = 6
Similarly,
DP =PB
11 = n
Thus, the required measure of n and m in the given parallelogram is 11 and 6.
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11. A sinking fund is set up with an annual interest rate of, 15% which is compounded monthly. If a $900 payme
is made at the end of each month, calculate both the interest earned and the account balance at the end of the
third month.
Period
Amount of Deposit
1
$900
2
$900
3
$900
At the end of the third month, the interest earned is $22.64, and the account balance is $2,733.89.
Interest Earned
$0.00
??
O At the end of the third month, the interest earned is $22.64, and the account balance is $2,711.24.
At the end of the third month, the interest earned is $11.24, and the account balance is $2,711.24
At the end of the third month, the interest earned is $22.48, and the account balance is $2, 722.48.
Account Balance
$900
??
Answers
Answer:
(a) Interest: $22.64; Balance: $2733.89
Step-by-step explanation:
You want a 3-month schedule of payments, interest, and the account balance for a sinking fund earning 15% APR on deposits of $900 made at the end of each month.
InterestThe interest earned by the account in any given month is the product of the monthly interest rate and the ending balance for the previous month.
The monthly interest rate is 15%/12 = 1.25%. For the second month, interest will be ...
$900 × 1.25% = $11.25
For the third month, interest will be ...
$1811.25 × 1.25% = $22.64
After the payment at the end of the third month, the account balance will be ...
$1811.25 +900.00 +22.64 = $2733.89
__
Additional comment
Total interest earned is $33.89 by the end of the third month. The answer choices seem to be telling you to interpret the question as asking for the interest earned in the third month, not the total interest earned.
There is a picnic table located along Path A. The table is located 1.5 miles along the path from the campsite. Which map shows the picnic table in the correct location?
Answers
The map that shows the picnic table in the correct location is illustrated below.
Firstly, we need to understand the concept of scale on a map. Maps are often drawn to scale, which means that the distances between different points on the map represent a proportional distance in real life. For instance, if one inch on the map equals one mile in real life, then two inches on the map would represent two miles in real life.
To do this, we need to locate the campsite on the map and measure out 1.5 miles along Path A. Once we have done this, we can mark this location on the map as the location of the picnic table.
However, we need to make sure that we are using a map that is drawn to scale. Otherwise, we might not be able to accurately measure the distance and locate the picnic table correctly.
Therefore, we need to examine the different maps that we have and find one that is drawn to scale. Once we have found a suitable map, we can measure out the distance from the campsite to the location of the table along Path A, and mark it on the map.
Finally, we can compare the location we have marked on the map with the location of the table as described in the problem. If they match up, we have found the correct location of the table on the map.
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A circle has a radius of 8 cm. A good estimate for the circumference of the circle is 24 cm. TrueFalse
Answers
False. The circumference of a circle is given by using the system 2πr, wherein r is the radius of the circle and π( pi) is a accurate constant about equal to 3.14.
If the radius of the circle is 8 cm, then the precise circumference is:
C = 2πr = 2 × 3.14 × 8 ≈ 50.24 cm
Consequently, the given estimate of 24 cm is extensively decrease than the real value of the circumference. a good estimate for the circumference of a circle with a radius of 8 cm would be closer to 50 cm than 24 cm.
It's crucial to be aware that the accuracy of any estimate depends at the approach used to generate it. If the estimate changed into primarily based on an incorrect assumption or an inaccurate measurement, then it can be extensively different from the real value.
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if ab is dilated by a scale factor of 2 centered at (3,5), what are the coordinates of the endpoints of its image, a9b9 ? (1) a9(27,5) and b9(9,1) (3) a9(26,8) and b9(10,4) (2) a9(21,6) and b9(7,4) (4) a9(29,3) and b9(7,21)
Answers
To find the coordinates of the endpoints of the image A'B' (A9B9) after dilation of AB by a scale factor of 2 centered at (3,5), follow these steps:
Step 1: Use the given scale factor (2) and center of dilation (3,5).
Step 2: Apply the dilation formula to the coordinates of the original points A and B. The formula for dilation with scale factor k centered at (h,k) is:
A'(x', y') = (h + k(x - h), k + k(y - k))
Step 3: Substitute the given options for A9 and B9 into the dilation formula and check which pair of coordinates satisfy the formula.
After applying the formula, it is determined that the coordinates of the endpoints of the image A9B9 after dilation with a scale factor of 2 centered at (3,5) are:
A9(21, 6) and B9(7, 4).
Option (2) is correct.
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9c - 73 = 6c - 10 What is the value of c?
Answers
[tex] \Large{\boxed{\sf c = 21}} [/tex]
[tex] \\ [/tex]
Explanation:Solving the equation for c means finding the value of that variable that makes the equality true.
[tex] \\ [/tex]
Given equation:
[tex] \sf 9c - 73 = 6c - 10[/tex]
[tex] \\ [/tex]
To isolate c, we will move the variables to the left member by subtracting 6c from both sides of the equation:
[tex] \sf 9c - 73 - 6c = 6c - 10 - 6c \\ \\ \sf3c - 73 = - 10[/tex]
[tex] \\ [/tex]
Then, we move the constants to the right member by adding 73 to both sides of the equation:
[tex] \sf 3c - 73+ 73 = - 10 + 73 \\ \\ \sf 3c = 63[/tex]
[tex] \\ [/tex]
Finally, divide both sides of the equation by the coefficient of the variable, 3:
[tex] \sf \dfrac{3c}{3} = \dfrac{63}{3} \\ \\ \implies \boxed{ \boxed{ \sf c = 21}}[/tex]
[tex] \\ \\ [/tex]
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This is an exercise of the first degree equation with one unknown is an algebraic equality in which the unknown (generally represented by x) appears with an exponent of 1 and the rest of the terms are constants or coefficients of the unknown. These equations can be solved to find the numerical value of the unknown that satisfies the equality.
The process for solving a first degree equation involves simplifying the equation by eliminating like terms and applying algebraic operations (addition, subtraction, multiplication, and division) to solve for the unknown. It is important to remember that the same operations are applied to both sides of the equation to maintain equality.
It is possible for a first degree equation to have a unique solution, no solution, or an infinite set of solutions. A unique solution means that there is a numerical value for the unknown that satisfies the equality. If the equation has no solution, it means that there is no numerical value for the unknown that satisfies the equality. If the equation has an infinite set of solutions, it means that any numerical value of the unknown that is chosen will satisfy the equality.
Quadratic equations with one unknown are fundamental in mathematics and have applications in many areas, such as solving problems in physics, chemistry, economics, and many other fields.
9c - 73 = 6c - 10
Solving a linear equation means finding the value of the variable that makes it true.
We want all the terms containing the variable to be on the left hand side and all the constants to be on the right hand side.
First, we move the constant to the right hand side by adding the opposite of -73 to both sides.
9c - 73 + 73 = 6c - 10 + 73
Two opposite numbers add up to zero, so we remove it from the expression.
9c = 6c - 10 + 73
We add the constants on the right hand side.
9c = 6c + 63
Now, we move the variable to the left side by adding the opposite of 6c to both sides.
9c - 6c = +6c - 6c + 63
Let's remember! Two opposite numbers add up to zero, so we remove them from the expression.
9c - 6c = 63
We simplify the left hand side by adding like terms.
3c = 63
To isolate the variable c on the left hand side, we have to divide both sides by 3. We have learned that a number divisible by itself is equal to 1, so we can reduce the left hand side to just c.
c = 63/3
All we have to do now is simplify the final division equation.
C = 21
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