Answer:
8
Step-by-step explanation:
7*4-5*4
28-20
8
this is your answer
Answer:
I think it is 8
Step-by-step explanation:
Assume that all grade-point averages are to be standardized on a scale between 0 and 6. How many grade-point averages must be obtained so that the sample mean is within 0.013 of the population mean? Assume that a 98% confidence level is desired. If using the range rule of thumb, σ can be estimated as range/4=(6-0)/2=1.5. Does the sample size seem practical?
Answer:
The sample size 'n' = 72,030
Step-by-step explanation:
Step(i):-
Given that the Estimate Error = 0.013
Given that the standard deviation of the Population = 1.5
The estimated error is determined by
[tex]E = \frac{Z_{0.98} S.D }{\sqrt{n} }[/tex]
Step(ii):-
Given that the Level of significance = 0.98 or 0.02
Z₀.₀₂ = 2.326
The estimated error is determined by
[tex]E = \frac{Z_{0.98} S.D }{\sqrt{n} }[/tex]
[tex]0.013 = \frac{2.326 X 1.5 }{\sqrt{n} }[/tex]
[tex]\sqrt{n} = \frac{3.489}{0.013} = 268.38[/tex]
Squaring on both sides, we get
n = 72,030
Final answer:-
The sample size 'n' = 72,030
2. State whether the number 21 is a perfect square, a perfect cube, or neither.
a. perfect square
b. neither
c. perfect cube
Answer:
B, neither
Step-by-step explanation:
21 is not a perfect square or perfect cube.
When Vondel Bradshaw checked his credit card statement, he found that a sales
slip dated 3/2 for $12.49 was posted as $12.99. He also found that a purchase
for $56.29 dated 2/19 was unauthorized. If the new balance on the statement
was $491.23, what is the correct new balance?
Answer: $548.02
Step-by-step explanation:
Correct for inaccurate postings...
add the $0.50 overcharge and the $56.29 unauthorized charge from $491.23
491.23+.50+56.29=548.02
Simon Company’s year-end balance sheets follow.
Cash $25,856 $29,050 $30,261.
Accounts receivable, net 73,485, 50,838, 39,936
Merchandise inventory 90,564, 69,893, 44,290
Prepaid expenses 8,084, 7,857, 3,362
Plant assets, net 227,492, 209,156, 194,051
Total assets $425,481, $366,794, $311,900
Liabilities and Equity
Accounts payable $102,766, $63,848, $41,583
Long-term notes payable secured by mortgages on plant assets 78,391, 82,675, 70,308
Common stock, $10 par value 162,500, 162,500, 162,500
Retained earnings 81,824, 57,771, 37,509
Total liabilities and equity $425,481, $366,794, $311,900
Compute the current ratio for each of the three years.
An educational psychologist wants to check claims that regular physical exercise improves academic achievement. To control for academic aptitude, pairs of college students with similar GPAs are randomly assigned to either a treatment group that attends daily exercise classes or a control group. At the end of the experiment, the following scores were reported for the six pairs of participants:
Pair Number Phyasical excercise(X1) No Physical excercise(X2)
1 4.00 3.75
2 2.67 2.74
3 3.65 3.42
4 2.11 1.67
5 3.21 3.00
6 3.60 3.25
7 2.80 2.65
a. Using t, test the null hypothesis at the .01 level of significance.
b. Specify the p-value for this test result.
c. If appropriate (because the test result is statistically significant), use Cohen's d to estimate the effect size.
d. How might this test result be reported in the literature?
Answer:
a. We fail to reject the null hypothesis
b. p > 0.01
c. The test result is not statistically significant
d. There not is enough statistical evidence to suggest that regular exercise improves academic achievement
Step-by-step explanation:
No. Physical Exercise (X₂); 3.75, 2.74, 3.42, 1.67, 3, 3.25, 2.65
Physical Exercise (X₁); 4.00, 2.67, 3.65, 2.11, 3.21, 3.60, 2.80
GPAs Pair number; 1, 2, 3, 4, 5, 6, 7
The null hypothesis, H₀; μ₁ ≤ μ₂
The alternative hypothesis, Hₐ; μ₁ > μ₂
From the data, we have;
[tex]\overline d[/tex] ≈ 0.222857
Where;
d = X₁ - X₂
[tex]\overline d = \dfrac{1}{n} \times \sum_{i = 1}^{n} d_i[/tex]
Similarly, we have;
[tex]s_d^2=\dfrac{\sum \left (d-\overline d \right )^{2} }{n - 1}[/tex]
From which we get;
[tex]s_d[/tex] ≈ 0.160905
The critical-t at n - 1 = 7 - 1 = 6 degrees of freedom for α = 1% = 0.01, is given as follows;
[tex]t_{\alpha /2}[/tex] = [tex]t_{(0.005, \, 6)}[/tex] = 3.707
The test statistic, t = [tex]\overline d[/tex]/([tex]s_d[/tex]/√n)
∴ t = 0.222857/(0.160905/√7) ≈ 3.664
The test statistic , t ≈ 3.664
Therefore, given that the test statistic is smaller than the critical-t,
b. The p-value estimate is p > 0.01
c. The test result is not statistically significant
d. The test result can be reported in a literature as that there is not enough statistical evidence to reject the null hypothesis, therefore, there not is enough statistical evidence to suggest that regular exercise improves academic achievement
Find the value of x in the triangle shown below.
a. x=4
b.x=5
c.x=2
d.x=32
Answer:
Answer:[tex] \huge\mathfrak\pink{S} \huge\mathfrak\purple{o} \huge\mathfrak\blue{l} \huge\mathfrak\red{u} \huge\mathfrak\green{t} \huge\mathfrak\pink{i}\huge\mathfrak\purple{o}\huge\mathfrak\red{n}\huge\mathfrak\orange{➔}\ [/tex]by using Pythagoras law:h²=p²+b²
9²=x²+7²
x²=81-49
x=√32units
What is 4.6m2 in cm2 ?
Answer:
4.6
Step-by-step explanation:
please help me i really need help please please really really need help please
Answer:
26.5
Step-by-step explanation:
I rounded it up. Basically use pythagorean theorem.
100 people in a sports centre are surveyed. 36 regularly use the fitness suite and the swimming pool. 57 use the fitness suite. 49 use the swimming pool. Complete the Venn diagram
Pythagorean theorem
a = 5 b = ? c = 11
Answer:
9.8
Step-by-step explanation:
Step-by-step explanation:
[tex] {a}^{2} + {b}^{2} = {c}^{2} [/tex]
[tex] {5}^{2} + {b}^{2} = {11}^{2} [/tex]
[tex] {b}^{2} = {11}^{2} - {5}^{2} [/tex]
[tex] {b}^{2} = 121 - 25[/tex]
[tex] {b}^{2} = 96[/tex]
[tex] \sqrt{b} = \sqrt{96} [/tex]
[tex]b = 9.78[/tex]
What is a correct definition of P-value?
p-value is a measure of the probability that an observed difference could have occurred just by random chance.
uurihghgihy5thpi 20 points!!! PLEASE HELP
Answer: I only see 10 points
Step-by-step explanation:
PLEASE HELP WILL MARK BRAINIEST! Asap
Answer:
n=8
Step-by-step explanation:
It’s a special 30-60-90 triangle, so n=8.
Answer:
54 Ok?
Step-by-step explanation: Thats what i got
how dizxhdklhjs'klz/'cljkdshkjl dk jkjslkn sdkjnkl jddddkls kl'lk jl
Answer:
what's that (✷‿✷)
shsyhwvqqhsidjsbshsb
An angle measures 88° less than the measure of its complementary angle. What is the measure of each angle? (please see the screen shot i need 2 answers)
Answer:
1° and 89°
Step-by-step explanation:
(x + 88°) + x = 90°
2x + 88 = 90
2x = 2
x = 1°
Rewrite the following sentence in the passive voice:
The people of Zanzibar extended a warm welcome to the tourists.
Answer:
When the tourists came, the people of Zanzibar extended a warm welcome.
I need helpppp I’ll give BRAINLY please help
Answer:
I this its the second one I'm not sure .
If right I’ll mark brainiest need ASAP
Answer:
The answer is 8
Answer:
16 inches
Step-by-step explanation:
First, do 56/7. You do this to see how much more feet it is than the scale. The answer is 8.
Because the answer is 8, you would multiply 2 inches by 8 to be proportional to 56 feet.
There are 396 students who are enrolled in an introductory biology course. If there are five boys to every four girls, how many boys are in the course?
Answer:
There are 220 boys in the course.
Step-by-step explanation:
If we group the five boys and four girls together, there would be 44 (396/9) groups of nine people. Since there are five boys in every group, you would do 44*5 which is 220.
Answer:
220 boys
Step-by-step explanation:
boys:girls
5:4
396 total
(5x44)+(4x44)=396
220+176=396
220 boys
H varies directly as L. If H = 30 when L=60, determine H when L= 40.
a) Write the variation equation.
b) Determine the value of the quantity indicated.
a) Choose the correct answer below.
O A. H=L
k.
O B. L=
H
O C. H=kL
w
k k
OD. H=*
b) H= |(Type an integer or a decimal.)
Answer:
i) The variation equation H = k L
ii) The value of H = 20
iii) C) H = k L
Step-by-step explanation:
Step(i):-
Given that H varies directly as L
H ∝ L
H = k L
Given that H =30 and L = 60
⇒ 30 = k (60)
[tex]k = \frac{30}{60} = \frac{1}{2}[/tex]
Step(ii):-
Given that L = 40
The variation of the equation = H = k L ...(i)
put L = 40 in equation (i)
[tex]H = \frac{1}{2} X 40 = 20[/tex]
Evaluate the expression 4+√−9 and write the result in the form a+bi
Answer:
4 + 3i
Step-by-step explanation:
i = sqrt(-1)
sqrt(-9) = 3 * sqrt(-1) = 3i
The 4 remains the same
4 + 3i
Answer:
Step-by-step explanation:
4+√(-9) = 4 + √9√(-1)
= 4 + 3i
The sum of a number and 4 times its reciprocal is 13/3
Find both possible numbers.
Answer:
3 ; 4/3
Step-by-step explanation:
x + 4(1/x) = 13/3
x + 4/x = 13/3
x^2 -13/3x + 4 = 0
3x^2 - 13x + 12 = 0
Δ = 169 - 144 = 25
x1 = (13 + 5)/6 = 3
x2 = (13-5)/6 = 4/3
Answer:
4/3 or 3
Step-by-step explanation:
Let, the number be x.
According to the question,
x+4×1/x=13/3
or, x+4/x=13/3
or, x^2+4/x=13/3
or, 3(x^2+4)=13x
or, 3x^2+12=13x
or, 3x^2-13x+12=0
or, 3x^2-(4+9)x+12=0
or, 3x^2-4x-9x+12=0
or, x(3x-4)-3(3x-4)=0
or, (3x-4)(x-3)=0
Either, Or,
3x-4=0 x-3=0
or, 3x=4 .•. x=3
.•. x=4/3
So, the possible numbers are 4/3 or 3.
Hi I need some help with this you you guys can help me
Answer:
Surface area of cube = 504.84 cm²
Step-by-step explanation:
Given:
Sum of all sides = 110.4 cm
Find:
Surface area of cube
Computation:
Sum of all sides = Perimeter of cube
Perimeter of cube = 12 x side
12 x side = 110.4
Side = 110.4 / 12
Side = 9.2 cm
Surface area of cube = 6 x Side²
Surface area of cube = 6 x 9.2²
Surface area of cube = 6 x 84.64
Surface area of cube = 504.84 cm²
Hannah was setting up a room with tables for an event. The room had 12 popular tables and 3 maple tables. What is the probability that the first person to enter the room will be randomly seated at a maple table? Give your answer as a reduced fraction.
Answer:
4 , 12 divided by 3 equals 4
Step-by-step explanation:
Ahmed invests $4000 in two different accounts. The first account paid 10 %, the second account paid 9% in
interest. At the end of the first year he had earned $370 in interest. How much was in each account?
Answer: 3000$ in 9% account
Step-by-step explanation: sums in accounts are x and (4000-x)
Interests are 0.09x and 0.10(4000-x) = 400-0.1x
Now you get 0.09x -0.1x + 400 = 370
Then -0.01x = -30 and x= 3000
What time is 11:59 PM is it midnight or midday?
PLZ HELP
1
9 in.
ALGEBRA
5 in.
15 in.
What is the volume of the shoebox shown above in cubic
inches (in.3)?
29
75
675
510
Answer:
675 in³
Step-by-step explanation:
The volume (V) of a cuboid is calculated as
V = lbh ( lis length, b is breadth and h the height )
Here l = 15, b = 5 and h = 9 , then
V = 15 × 5 × 9 = 675 in³
Find the area of the figure, in square meters, to 1 decimal place.
Answer:
Where is the picture of the figure
Step-by-step explanation:
A sample of restaurants in a city showed that the average cost of a glass of iced tea is $1.25 with a a standard
deviation of 7c. Three of the restaurants charge 95¢, 1.00, and $1.35. Determine the z-value for each restaurant.
Answer:
For the restaurant that charges 95 cents, the z-score is -4.29.
For the restaurant that charges $1, the z-score is -3.57.
For the restaurant that charges $1.35, the z-score is 1.43
Step-by-step explanation:
Z-score:
In a set with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the z-score of a measure X is given by:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.
The average cost of a glass of iced tea is $1.25 with a standard deviation of 7c.
This means that [tex]\mu = 1.25, \sigma = 0.07[/tex]
Restaurant that charges 95 cents:
The z-score is found when X = 0.95. So
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
[tex]Z = \frac{0.95 - 1.25}{0.07}[/tex]
[tex]Z = -4.29[/tex]
For the restaurant that charges 95 cents, the z-score is -4.29.
Restaurant that charges $1:.
X = 1
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
[tex]Z = \frac{1 - 1.25}{0.07}[/tex]
[tex]Z = -3.57[/tex]
For the restaurant that charges $1, the z-score is -3.57.
Restaurant that charges $1.35:
X = 1.35
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
[tex]Z = \frac{1.35 - 1.25}{0.07}[/tex]
[tex]Z = 1.43[/tex]
For the restaurant that charges $1.35, the z-score is 1.43
GIVING OUT BRAINLIEST ANSWER !! PLS HELP ME OUT !! (last minute)
Answer:
1:[tex]\sqrt{3}[/tex];2
Step-by-step explanation:
those are the side length ratios
Answer:
1:√3:2
Step-by-step explanation:
Brainliest please