The value of x at which f(x) is a minimum is 3/2.
To find the minimum value of f(x), we need to calculate its derivative and set it equal to zero.
So,
[tex]f(x) = ∫(x^2 - 3x - 2) e^(t^2) dt[/tex]
Taking the derivative of f(x) with respect to x, we get:
[tex]f'(x) = 2x e^(x^2 - 3x - 2) - 3 e^(x^2 - 3x - 2)[/tex]
Setting f'(x) equal to zero:
[tex]2x e^(x^2 - 3x - 2) - 3 e^(x^2 - 3x - 2) = 0[/tex]
Factorizing, we get:
[tex]e^(x^2 - 3x - 2) (2x - 3) = 0[/tex]
So, either e[tex]^(x^2 - 3x - 2)[/tex]= 0 (which is not possible), or
2x - 3 = 0
Solving for x, we get:
x = 3/2
Therefore, the value of x at which f(x) is a minimum is 3/2.
Learn more about derivative
https://brainly.com/question/30365299
#SPJ4
f'(x) changes from negative to positive at x = 2.105, we know that f(x) has a local minimum at x = 2.105.
Therefore, the answer is c. 2.
To find the value of x at which f(x) is a minimum, we need to find the critical points of f(x) and then determine whether each critical point is a minimum or maximum using the first derivative test.
To find the critical points of f(x), we need to find where f'(x) = 0. Using the Fundamental Theorem of Calculus and the Chain Rule, we can find that:
[tex]f'(x) = 2x - 3 - 2xe^{(x^2-3x-2t^2)}[/tex]
To find where f'(x) = 0, we need to solve the equation[tex]2x - 3 - 2xe^{x^2-3x-2t^2} = 0[/tex] for x. Unfortunately, this equation cannot be solved algebraically, so we need to use numerical methods. One way to do this is to use a graphing calculator or computer program to graph y = 2x - 3 and[tex]y = 2xe^{x^2-3x-2t^2)[/tex]and find their intersection(s).
Using this method, we can find that there is only one critical point, which is approximately x = 2.105. To determine whether this critical point is a minimum or maximum, we need to use the first derivative test. Since f'(x) changes from negative to positive at x = 2.105, we know that f(x) has a local minimum at x = 2.105.
Therefore, the answer is c. 2.
learn more about local minimum
https://brainly.com/question/10878127
#SPJ11
An 18 gram sample of a substance that's used to detect explosives has a k-value of 0.215.
Find the substance's half-life in days. Round your answer to the nearest tenth.
The substance's half-life in days is 3 days.
What is exponential decay?
If a quantity declines at a pace proportionate to its current value, exponential decay may be present. The term "exponential decay" in mathematics refers to the process of a constant percentage rate reduction in an amount over time.
Here, we have
Given: An 18-gram sample of a substance that's a by-product of fireworks has a k-value of 0.215.
We have to find the substance's half-life in days.
Using the formula for the exponential decay that is N = N₀e⁻ⁿˣ,
we have N = 18/2, N₀ = 18, and n = 0.215.
N = N₀e⁻ⁿˣ
9 = 18e⁻⁰°²¹⁵ˣ
9/18 = e⁻⁰°²¹⁵ˣ
1/2 = e⁻⁰°²¹⁵ˣ
Taking logs on both sides, we get
㏑(1/2) = -0.215x
x = ㏑(1/2)/(-0.215)
x = -0.6931/(-0.215)
x = 3.22
Hence, the substance's half-life in days is 3 days.
To learn more about the exponential decay from the given link
https://brainly.com/question/31409569
#SPJ1
Find the surface area of the sphere. Use 3.14 for pi.
sphere is 7 yd
Explain what values must be known to write the explicit formula for both an arithmetic and geometric sequence?
PLEATHE!!
The explicit formula for an arithmetic sequence is:
an = a1 + (n-1)d
The explicit formula for a geometric sequence is:
an = a1 * [tex]r^{(n-1)}[/tex]
What is arithmetic sequence?
An arithmetic sequence is a sequence of numbers in which each term after the first is found by adding a fixed constant number, called the common difference, to the preceding term.
To write the explicit formula for both an arithmetic and geometric sequence, the following values must be known:
For an Arithmetic Sequence:
The first term (a1) of the sequence.
The common difference (d) between consecutive terms in the sequence.
The explicit formula for an arithmetic sequence is:
an = a1 + (n-1)d
Where:
an is the nth term of the sequence.
a1 is the first term of the sequence.
d is the common difference between consecutive terms.
n is the position of the term in the sequence.
For a Geometric Sequence:
The first term (a1) of the sequence.
The common ratio (r) between consecutive terms in the sequence.
The explicit formula for a geometric sequence is:
an = a1 * r^(n-1)
Where:
an is the nth term of the sequence.
a1 is the first term of the sequence.
r is the common ratio between consecutive terms.
n is the position of the term in the sequence.
Therefore, The explicit formula for an arithmetic sequence is:
an = a1 + (n-1)d
The explicit formula for a geometric sequence is:
an = a1 * [tex]r^{(n-1)}[/tex]
To learn more about arithmetic sequence from the given link:
https://brainly.com/question/15412619
#SPJ1
how can the power series method be used to solve the nonhomogeneous equation, about the ordinary point ? carry out your idea by solving the equation. you can either attach your work or type in your work.
The power series method can be used to solve a nonhomogeneous differential equation about an ordinary point by finding both a homogeneous and particular solution using a series expansion and the method of undetermined coefficients.
The power series method is a technique used to find a series solution of a differential equation. When applied to a nonhomogeneous differential equation, the method involves finding both a homogeneous solution and a particular solution.
Assuming that the nonhomogeneous differential equation has the form
y''(x) + p(x)y'(x) + q(x)y(x) = f(x)
where p(x), q(x), and f(x) are functions of x, we can begin by finding the solution to the associated homogeneous equation
y''(x) + p(x)y'(x) + q(x)y(x) = 0
Using the power series method, we can assume a solution of the form:
y(x) = a0 + a1(x - x0) + a2(x - x0)^2 + ...
where a0, a1, a2, ... are constants to be determined, and x0 is the ordinary point of the differential equation.
Next, we can find the coefficients of the power series by substituting the series solution into the differential equation and equating coefficients of like powers of (x-x0). This leads to a system of equations for the coefficients, which can be solved iteratively.
After finding the homogeneous solution, we can find a particular solution using a similar method. Assuming a particular solution of the form:
y(x) = u(x) + v(x)
where u(x) is a solution to the associated homogeneous equation, and v(x) is a particular solution to the nonhomogeneous equation, we can use the method of undetermined coefficients to find v(x). This involves assuming a form for v(x) based on the form of f(x), and then solving for its coefficients using the same technique as before.
Once we have found both the homogeneous and particular solutions, we can combine them to obtain the general solution to the nonhomogeneous differential equation.
Learn more about nonhomogeneous differential equation here
brainly.com/question/30876746
#SPJ4
What is the range of f? A coordinate plane. The x- and y-axes both scale by one. The graph of the function f starts at negative six, negative two, which is plotted. Then is decreases at a non linear rate to negative five, negative five, where it increases at a non linear rate to negative two, one and one-half. At two, one and one-half the function decreases at a non linear rate through the origin and to the point two, negative one and one-half. Then the function increases at a non linear rate until five, five, which is plotted.
A coordinate plane. The x- and y-axes both scale by one. The graph of the function f starts at negative six, negative two, which is plotted. Then is decreases at a non linear rate to negative five, negative five, where it increases at a non linear rate to negative two, one and one-half. At two, one and one-half the function decreases at a non linear rate through the origin and to the point two, negative one and one-half. Then the function increases at a non linear rate until five, five, which is plotted.
Choose 1 answer:
(Choice A) The f(x)-values -6, -3, 0, 2, and 5
(Choice B) The f(x)-values -5, -2, 0, 2, and 5
(Choice C) -6 ≤ f(x) ≤ 5
(Choice D) − 5 ≤ f(x) ≤ 5
The range of f include the following: D. -5 ≤ f(x) ≤ 5.
What is a domain?In Mathematics and Geometry, a domain is the set of all real numbers for which a particular function is defined.
Additionally, the vertical extent of any graph of a function represents all range values and they are always read and written from smaller to larger numerical values, and from the bottom of the graph to the top.
By critically observing the graph shown in the image attached above, we can reasonably and logically deduce the following domain and range:
Domain = {-6, 5} or -6 ≤ x ≤ 5.
Range = {-5, 5} or -5 ≤ f(x) ≤ 5.
Read more on domain here: brainly.com/question/17440903
#SPJ1
an object is 19.0 cm from the center of a spherical silvered-glass christmas tree ornament 6.00 cm in diameter. What is the position of its image (counting from the ornament surface)?
The position of the image is approximately 1.71 cm from the ornament's surface.
To determine the position of the image, we need to use the mirror formula for a concave mirror, which is \frac{1}{f} = [tex]\frac{1}{do} + \frac{1}{di},[/tex] where f is the focal length, do is the object distance, and di is the image distance.
First, we need to find the focal length (f) of the spherical ornament. The radius of curvature (R) is half the diameter, so R = 6.00 cm / 2 = 3.00 cm. For a spherical mirror, the focal length is half the radius of curvature: f = R/2 = 3.00 cm / 2 = 1.50 cm.
Next, we need to find the object distance (do). The object is 19.0 cm from the center of the ornament, but we need the distance from the ornament's surface. Since the radius is 3.00 cm, we subtract that from the total distance: do = 19.0 cm - 3.00 cm = 16.0 cm.
Now, we can use the mirror formula:
\frac{1}{f} = [tex]\frac{1}{do} + \frac{1}{di},[/tex]
1/1.50 cm = 1/16.0 cm + 1/di
To solve for di, subtract 1/16.0 cm from both sides and then take the reciprocal:
1/di = 1/1.50 cm - 1/16.0 cm
di ≈ 1.71 cm
The position of the image is approximately 1.71 cm from the ornament's surface.
learn more about the mirror formula for a concave mirror,
https://brainly.com/question/3555871
#SPJ11
The position of the image is 20.8 cm from the center of the spherical ornament, counting from the ornament surface.
To find the position of the image, we can use the mirror equation:
1/o + 1/i = 1/f
where o is the object distance from the center of the spherical ornament, i is the image distance from the center of the spherical ornament, and f is the focal length of the ornament.
Since the ornament is a spherical mirror, the focal length is half the
radius of curvature, which is half the diameter of the ornament:
f = R/2 = 6.00 cm/2 = 3.00 cm
Substituting the given values, we get:
1/19.0 cm + 1/i = 1/3.00 cm
Solving for i, we get:
1/i = 1/3.00 cm - 1/19.0 cm = (19.0 cm - 3.00 cm)/(3.00 cm x 19.0 cm) = 0.0481 cm^-1
i = 1/0.0481 cm = 20.8 cm
Therefore, the position of the image is 20.8 cm from the center of the
spherical ornament, counting from the ornament surface.
for such more question on ornament surface
https://brainly.com/question/30938695
#SPJ11
1.what is the surface area of a cone with a radius of 5m and a slant height of 8m?
2.a box has a side of 9cm what is its surface area?
3.compute for the surface area of a cube with a side of 8cm
4.an aquarium has a length of 6m width of 10m and a height of 7m what is its surface area?
5.find the surface area of a rectangular prism with a length of 5cm width of 8cm and a height of 6cm
6.what is the surface area of a square pyramid with a side of 9cm and a height of 7cm.
A curved ladder that children can climb on can be modeled by the equation y=-1/20x^2+x where x and y are measured in feet. Make a table of values that shows the height of the ladder for x = 0, 5, 10 , 15, and 20 feet from the left end
The values of x and y of a curved ladder in feet given by the equation y=-1/20x^2+x are as follows in tabular form,
Values of x (in feet) Values of y (in feet)
0 0
5 3.75
10 5
15 3.75
20 0
A curved ladder that children can climb on is modeled by the system of equations as,
y=-(1/20)x^2+x
where, x and y are measured in feet.
Putting x= 0 in the above equation y=-(1/20)x^2+x , we get,
y = - (1/20) (0^2) + (0) = 0
Putting x= 5 in the above equation y=-(1/20)x^2+x , we get,
y= - (1/20)(5^2)+(5) = -5/4 + 5 = 15/4 = 3.75
Putting x= 10 in the above equation y=-(1/20)x^2+x , we get,
y= - (1/20)(10^2)+(10) =-5 +10 = 5
Putting x= 15 in the above equation y=-(1/20)x^2+x , we get,
y= - (1/20)(15^2)+(15) = -45/4 +15= 3.75
Putting x= 20 in the above equation y=-(1/20)x^2+x , we get,
y= - (1/20)(20^2)+(20) = -20 +20 = 0
Hence, when x= 0 feet, y = 0 feet ; x= 5 feet, y = 3.75 feet ; x = 10 feet, y = 5 feet ; x =15 feet , y =03.75 feet ;and x = 20feet, y = 0 feet from the solving the given equation.
To know more about putting values in system of equations here
https://brainly.com/question/3212871
#SPJ4
In ΔUVW, w = 1. 4 cm, m m∠W=63° and m m∠U=29°. Find the length of v, to the nearet 10th of a centimeter
The length of v, to the nearest 10th of a centimeter is 2.2.
To find the length of side v in triangle UVW, we can use the law of sines, which states that the ratio of the length of a side of a triangle to the sine of the angle opposite that side is the same for all sides and angles in the triangle.
Using this formula, we have,
v/sin(m∠V) = w/sin(m∠W)
We know that w = 1.4 cm and m∠W = 63°. To find sin(m∠W), we can use a calculator,
sin(63°) ≈ 0.89
Substituting the values we know into the formula, we get,
v/sin(m∠V) = 1.4/0.89
To solve for v, we need to find sin(m∠V). We know that the sum of the angles in a triangle is 180°, so we can find m∠V by subtracting the measures of the other two angles from 180°,
m∠V = 180° - m∠U - m∠W
m∠V = 180° - 29° - 63°
m∠V = 88°
Now, we can substitute the value of sin(m∠V) into the equation and solve for v,
v/ sin(88°) = 1.4/0.89
v ≈ 2.2 cm
Therefore, the length of side v in triangle UVW is approximately 2.2 cm to the nearest tenth of a centimeter.
To learn more about length here:
https://brainly.com/question/16537545
#SPJ4
Answer:
1.6
Step-by-step explanation: This is answer on DeltaMath
Mack's Toy Shop made 600 trains yesterday and found that 30 were defective. They
plan to make 4,500 trains this week.
Using the information given, how many trains are expected to be defective?
225 trains
6,000 trains
15 trains
500 trains
Answer:
225 trains
Step-by-step explanation:
since they are using the same process and materials, we expect them to have the same ratio between trains made and defective trains :
600 / 30 = 20/1
one out of 20 is defect.
so, when they make 4500 trains, we need to divide this by 20 to get the number of expected defective trains :
4500 / 20 = 225
I find the answer option of 6000 defective trains really funny : if that were true, more than the produced trains (4500) would be defective. how ... ?
if the florida distirution is also approximately morlam, but with a standard deviation of 2.9 inches, what is the mean height of a football player on this florida team? ap stat
To find the mean height of a football player on this Florida team, we need to know the mean of the normal distribution (Morlam) and the standard deviation of the Florida distribution. Since the Florida distribution is also approximately normal (Morlam) with a standard deviation of 2.9 inches, we can use the Empirical Rule to estimate the mean height.
According to the Empirical Rule, approximately 68% of the data falls within one standard deviation of the mean, approximately 95% within two standard deviations, and approximately 99.7% within three standard deviations. Since we know that the standard deviation of the Florida distribution is 2.9 inches, we can assume that the mean height falls within three standard deviations of the mean.
So, if we assume that the mean height is at the centre of the distribution, we can estimate it by adding and subtracting three standard deviations from it. Therefore, the mean height of a football player on this Florida team can be estimated to be:
Mean height = Mean of the Morlam distribution ± 3 x Standard deviation of the Florida distribution
Mean height = Mean of the Morlam distribution ± 3 x 2.9 inches
Without knowing the mean of the Morlam distribution, we cannot calculate the exact mean height. However, if we assume that the Morlam distribution has a mean height of 70 inches (a typical average height for a football player), then the mean height of a football player on this Florida team can be estimated to be:
Mean height = 70 ± 3 x 2.9
Mean height = 70 ± 8.7
Mean height = 61.3 to 78.7 inches
Therefore, we can estimate that the mean height of a football player on this Florida team is between 61.3 and 78.7 inches.
Learn more about Normal Distribution here: brainly.com/question/17199694
#SPJ11
We can estimate that the mean height of a football player on the Florida team is approximately 70 inches.
To find the mean height of a football player on the Florida team, we need to know the exact distribution of heights. However, since we only have information about the standard deviation and the fact that it is approximately normal, we can make an educated guess that the distribution is still normal with a mean somewhere close to the national average of 70 inches.
Using the empirical rule, we know that about 68% of the data falls within one standard deviation of the mean. In this case, one standard deviation is 2.9 inches.
So, we can assume that about 68% of the heights on the Florida team fall between (70-2.9) = 67.1 inches and (70+2.9) = 72.9 inches.
If we assume that the distribution is symmetric, we can estimate the mean height of the Florida team by taking the average of the lower and upper bounds of the interval: (67.1 + 72.9)/2 = 70 inches.
For similar question on mean.
https://brainly.com/question/23251787
#SPJ11
URGENT!! Will give brainliest :)
What is the equation for the line of best fit for the following data? Round the slope and -intercept of the line to three decimal places.
A. y=-0.580×+ 10.671
B. y=-10.671 x+ 0.580
C. y= 10.671 x-0.580
D. y= 0.580x - 10.671
To find the equation for the line of best fit, we can use linear regression. Based on the given data:
x: 2, 5, 7, 12, 16
y: 9, 10, 5, 3, 2
The equation for the line of best fit would be in the form: y = mx + b, where m is the slope and b is the y-intercept.
Using a calculator or statistical software, we can calculate the slope and y-intercept for the line of best fit.
The result is:
Slope (m): -0.580 (rounded to three decimal places) Y-intercept (b): 10.671 (rounded to three decimal places)
So, the correct answer is:
A. y = -0.580x + 10.671
a researcher has collected the following sample data. the mean of the sample is 5. 3 5 12 3 2 the coefficient of variation is . a. 81.24% b. 72.66% c. 330% d. 264%
The mean of the sample is 5, 3, 5, 12, 3, 2 the coefficient of variation is 91%. Option A is the correct answer.
To calculate the coefficient of variation, first, we need to calculate the standard deviation and mean of the sample.
The mean of the sample is (3 + 5 + 12 + 3 + 2)/5 = 5.
To find the standard deviation, we first need to calculate the variance. The variance can be found by taking the sum of the squared differences between each data point and the mean, dividing by the sample size minus one, and then taking the square root.
The variance is ((3-5)² + (5-5)² + (12-5)² + (3-5)² + (2-5)²)/4 = 20.5.
The standard deviation is the square root of the variance, which is approximately 4.53.
Finally, we can calculate the coefficient of variation by dividing the standard deviation by the mean and multiplying by 100%.
Coefficient of variation = (4.53/5) x 100% = 90.6%.
Learn more about the coefficient of variation at
https://brainly.com/question/13293164
#SPJ4
The question is -
A researcher has collected the following sample data. The mean of the sample is 5, 3, 5, 12, 3, 2 the coefficient of variation is?
a. 91%
b. 72.66%
c. 330%
d. 264%
4y = -x - 32 (Show work)
Answer: the solution for y in terms of x is y = (-1/4)x - 8.
Step-by-step explanation: In order to obtain a solution for y in the given equation of 4y = -x - 32, it is imperative to achieve the isolation of y on a singular side of the equation. To accomplish this task, it is possible to perform division on both sides of the equation by a factor of 4:
The given equation 4y/4 = (-x - 32)/4 can be expressed in an academic manner as follows: The given equation reveals that the quotient of 4y divided by 4 is equivalent to the quotient of the opposite of x added to negative 32, also divided by 4.
Upon performing simplification, the expression on the right-hand side yields:
The equation y = (-1/4)x - 8 can be expressed in an academic manner as follows: The dependent variable y is equivalent to the product of the constant (-1/4) and the independent variable x, with an additional decrement of eight.
A scale drawing of a famous statue uses a scale factor of 230:1. If the height of the drawing is 1.2 feet, what is the actual height of the statue?
191.7 feet
228.2 feet
231.2 feet
276 feet
The actual height of the statue is option C 231.2 feet.
What is scale factor?A scale factor is a number used in mathematics to scale or multiply a quantity or measurement by another factor in order to establish a proportional relationship between two identical figures or objects.
In other terms, the scale factor is the ratio of the corresponding lengths, widths, or heights of the two figures or objects if they are similar, that is, they have the same shape but may range in size. This implies that you may determine the dimension of the second object by multiplying one dimension of one object by the scale factor.
Given that the scale factor is 230:1.
Thus,
actual height of statue / 230 = height of drawing / 1.2 feet
Now,
actual height of statue = (1.2 feet / 1.2 feet) * 230
actual height of statue = 230 feet
Hence, the actual height of the statue is option C 231.2 feet.
Learn more about scale factor here:
https://brainly.com/question/29464385
#SPJ1
of the cartons produced by a company, 3% have a puncture, 6% have a smashed corner, and 1.4% have both a puncture and a smashed corner. find the probability that a randomly selected carton has a puncture or a smashed corner.
The probability that a randomly selected carton has a puncture or a smashed corner is 0.076, or 7.6%.
What is probability?
Probability is a measure of the likelihood of an event occurring. It is a number between 0 and 1, where 0 means the event is impossible and 1 means the event is certain to happen.
To find the probability that a randomly selected carton has a puncture or a smashed corner, we can use the formula:
P(puncture or smashed corner) = P(puncture) + P(smashed corner) - P(puncture and smashed corner)
where P(puncture) is the probability of a carton having a puncture, P(smashed corner) is the probability of a carton having a smashed corner, and P(puncture and smashed corner) is the probability of a carton having both a puncture and a smashed corner.
Substituting the given probabilities into the formula, we get:
P(puncture or smashed corner) = 0.03 + 0.06 - 0.014
P(puncture or smashed corner) = 0.076
Therefore, the probability that a randomly selected carton has a puncture or a smashed corner is 0.076, or 7.6%.
To learn more about probability from the given link:
https://brainly.com/question/30034780
#SPJ1
a production process is designed to fill 100 soda cans per minute with with 6.8 ounces of soda, on average. overfilling is costly and under-filling risks a large fine. you are the production chief and instruct your staff to take regular random samples to test the process. what is the correct way to set up the hypotheses test?
Answer:
6.8 ounces
To set up a hypothesis test for this production process, we need to define the null and alternative hypotheses. The null hypothesis (H0) is that the average amount of soda in each can is equal to 6.8 ounces, while the alternative hypothesis (Ha) is that the average amount of soda in each can is not equal to 6.8 ounces.
We can then collect data by taking regular random samples from the production process and calculate the sample mean and standard deviation. We can then perform a statistical test such as a t-test or z-test to determine whether we can reject or fail to reject the null hypothesis.
If we reject the null hypothesis, we can conclude that there is evidence that the average amount of soda in each can is different from 6.8 ounces. If we fail to reject the null hypothesis, we cannot conclude that there is evidence that the average amount of soda in each can is different from 6.8 ounces.
I hope this helps! Let me know if you have any other questions.
PLS HELP ME ON THIS
WHAT COULD BE THE LARGEST WHOLE NUMBER?
Step-by-step explanation:
7 + x = 2x, so x = 7
true or false? use cases can help with developing quantitative and measurable usability tests. group of answer choices
The given statement about developing quantitative and measurable usability tests is true.
Explain about how this given statement is true?Use cases can help with developing quantitative and measurable usability tests. Use cases are scenarios that describe how a user might interact with a system or product in a specific situation.
By developing use cases, researchers can identify specific tasks that users may need to perform and design usability tests to measure how well users can perform those tasks.
This can help make the usability tests more objective and measurable, as researchers can use metrics such as completion rates, task time, and errors to assess the usability of the system or product.
Learn more about usability tests.
brainly.com/question/28807738
#SPJ11
A brick has a mass of 2,022.75 grams and a volume of 1,064.5 cubic centimeters.
What is the density of the brick, in grams per cubic centimeter (³) ²¹
g
cm
3
Round your answer to the nearest tenth.
Answer:
To find the density of the brick, we need to divide its mass by its volume:
density = mass / volume
Plugging in the values given in the problem, we get:
density = 2,022.75 g / 1,064.5 cm³
Simplifying the division, we get:
density = 1.8996 g/cm³
Rounding to the nearest tenth, we get:
density ≈ 1.9 g/cm³
Therefore, the density of the brick is approximately 1.9 grams per cubic centimeter (g/cm³).
An electronic book device had a value of t dollars before a holiday. The value decreased by 15% after the holiday. Which expressions show the value of the electronic book device after the holiday? Select all the expressions that apply.
A. 1.15
B. 0.85
C. −0.15
D. 1−0.15
E. −0.85
F. (1−0.15)
The expressions that correctly show the value of the electronic book device after the holiday are B and D, which represent the percentage decrease of 15% as 0.85 (or 1-0.15).
Which expressions show the value of the electronic book device after the holiday?The value of an electronic book device before a holiday is represented by the variable t. After the holiday, the value of the device decreased by 15%. To find the value of the device after the holiday, we need to multiply the original value by the percentage decrease, which is 0.85 (or 1-0.15). Therefore, the expressions that correctly show the value of the electronic book device after the holiday are B and D.
Option A (1.15) represents the percentage increase and not the decrease, so it is incorrect. Option C (-0.15) represents the percentage decrease, but it cannot be used alone to find the new value. Option E (-0.85) is the negative of the percentage decrease, so it is also incorrect. Finally, option F is equivalent to option D, so it is also correct.
In summary, the expressions that correctly show the value of the electronic book device after the holiday are B and D, which represent the percentage decrease of 15% as 0.85 (or 1-0.15).
to know more about electronic
brainly.com/question/1255220
#SPJ1
the school picnic is a two-day weekend event. it has been scheduled for may. the area routinely gets 16 rainy days in may. what is the probability that the weekend will be dry?
The probability of the weekend being dry for the school picnic is approximately 23.4%.
First, let's define some terms:
1. Probability: The likelihood of a specific event happening
2. Picnic: The school event that is scheduled for a two-day weekend in May
3. Rainy: Refers to days with rain
Now, let's calculate the probability that the weekend will be dry:
There are 16 rainy days in May, and May has 31 days. So, there are (31 - 16) = 15 dry days in May.
Each weekend has two days. Since May has 31 days, there are (31 / 7) = approximately 4.43 weeks in May. To account for the remaining days, we round down to 4 weeks and add the remaining 2 days as another weekend, resulting in 5 weekends.
Now, we'll determine the probability of having a dry day on any given day in May:
Dry day probability = (number of dry days) / (total days in May) = 15 / 31 ≈ 0.484
Since we want the probability of having two consecutive dry days (the whole weekend), we'll multiply the probabilities of each day being dry:
Weekend probability of being dry = (dry day probability) * (dry day probability) ≈ 0.484 * 0.484 ≈ 0.234
So, the probability of the weekend being dry for the school picnic is approximately 23.4%.
Learn more about Probability here: brainly.com/question/30034780
#SPJ11
Simplify the expression (−1 3/4)^2 - √ [127−2(3)]
On simplifying the expression (−1 3/4)²- √ [127−2(3)] we get -127/16
Simplifying an expression:
To simplify the expression, we need to follow the order of operations, which is PEMDAS: Parentheses, Exponents, Multiplication and Division (from left to right), and Addition and Subtraction (from left to right).
First, we simplify the exponent by squaring -1 3/4 to get 49/16. Then, we simplify the expression under the square root by subtracting 2 times 3 from 127 to get 121, and we take the square root of 121 to get 11.
Here we have
(−1 3/4)²- √ [127−2(3)]
The above expression can be simplified as follows
=> (−1 3/4)²- √ [127−2(3)]
Convert the mixed fraction into an improper fraction
=> 1 3/4 = 7/4 [ ∵ 4 × 1 + 3 = 7 ]
So given expression can be
=> (−7/4)²- √ [127−2(3)]
=> (49/16) - √ [121]
=> (49/16) - 11
=> (49 - 176 /16)
=> -127/16
Therefore,
On simplifying the expression (−1 3/4)²- √ [127−2(3)] we get -127/16
Learn more about Expression at
https://brainly.com/question/30148250
#SPJ1
in the regression of the general fertility rate (gfr) on the tax personal exemption (pe) and its first lag the fitted regression is: what is the impact propensity?
The impact propensity can be interpreted as the slope coefficient for the tax personal exemption (pe) or its first lag in
the regression equation.
To determine the impact propensity in the regression of the general fertility rate (GFR) on the tax personal exemption
(PE) and its first lag, you should follow these steps:
Estimate the regression model using the available data. The model should look like this:
GFR = β0 + β1 × PE + β2 × PE_lag + ε
Where GFR is the general fertility rate, PE is the tax personal exemption, PE_lag is the tax personal exemption's first
lag, and ε is the error term.
Obtain the estimated coefficients (β0, β1, and β2) from the fitted regression model.
These coefficients will help you determine the impact propensity.
Calculate the impact propensity. The impact propensity in this context refers to the change in the general fertility rate
resulting from a one-unit increase in the tax personal exemption, taking into account both its current and lagged
effects.
To find the impact propensity, sum the coefficients for the tax personal exemption and its first lag:
Impact propensity = β1 + β2
for such more question on propensity
https://brainly.com/question/20376297
#SPJ11
Learning Task 4. Multiply each of the following. Use cancellation method
if possible. Write your answer in your notebook.
1. 5/7•14/35
2. [4/5][10/11]
3. 8 3/4 multiplied by 2/9
4. [4/5]10/11][7/8]
please answer this
Answer:1
1. is 2/7
2. is .5
3 is 1.94 repeating and
4 is 7/11
Step-by-step explanation:
A local doctor’s office logged the number of patients seen in one day by the doctor for ten days. Find the mean, median, range, and midrange of the number of patients seen in ten days.
27, 31, 27, 35, 35, 25, 28, 35, 33, 24
Calculate the mean, median, range, and midrange of the number of patients seen in ten days.
Answer:
Step-by-step explanation:
Medium is 28
Mean is 29
Range is 11
Midrange is 29.5
What is the total surface area of the figure shown?
The total surface area of the given figure is 619.2 in², which is not listed in the provided options.
Give a brief account on total surface area.The surface area is known to be measure of the total area occupied by the surface of the object. Defining the surface area mathematically in the presence of a curved surface is better than defining the arc length of a one-dimensional curve, or the surface area of a polyhedron (i.e. an object with flat polygonal faces). Much more complicated. For a smooth surface sphere such as the following, surface area is assigned using representation as a parametric surface. This surface definition is based on calculus and includes partial derivatives and double integrals.
The triangular face of the given figure represent an equilateral triangle of sides 12 in.
Area of the triangle = (√3/4) × a²
Area of the triangular face:
= (√3/4) × 12²
= (√3/4) × 144
= 57.6 in²
Area of the rectangle = Length × width
Area of the rectangular face:
= 12 × 14
= 168 in²
Area of the given figure:
= (2 × 57.6) + (3 × 168)
= 115.2 + 504
= 619.2 in²
To know more about polygonal faces, visit:
https://brainly.com/question/16550007
#SPJ1
Find a degrees. a 12 13 5
In the given triangle, α is equal to 67.36°.
What is a triangle's definition?
A triangle is a two-dimensional closed geometric form that has three sides, three angles, and three vertices (corners). It is the most basic polygon, produced by joining any three non-collinear points in a plane. The sum all angles of a triangle is always 180°. Triangles are classed according to their side length (equilateral, isosceles, or scalene) and angle measurement (acute, right, or obtuse).
Now,
Using Trigonometric functions
We can use the sine function
So,
Sin α=Perpendicular/Hypotenuse
Sin α = 12/13
α=67.36°
Hence,
The value of α will be 67.36°.
To know more about triangles visit the link
brainly.com/question/2773823
#SPJ1
please someone help and give answers !!!
16.) Mean average deviation= option C
17.) Range of a data set = option E.
18.) First quartile = opinion AB
19.) Second quartile = option B
20.) Third quartile = option A
21.) Interquartile range = option D
How to determine the measures of the spread?
To determine the measures of the spread is to match their various definitions to the correct measures given such as follows:
16.) Mean average deviation: The average deviation of data from the mean.
17.) Range of a data set : The difference between the highest value and the lowest value in a numerical data set.
18.) First quartile: The median in the lower half.
19.) Second quartile: The median value in a data set.
20.) Third quartile: The median in the upper half.
21.) Interquartile range: The distance between the first and the third quartile.
Learn more about range here:
https://brainly.com/question/26098895
#SPJ1
What is the value of x in this triangle?
x=47°
The degree of a triangle is equal to 180°.
Since a triange=180°, you would subtract 180 by 102+31 because the other two angles are 102° and 31°.
180-102-31=47°
Therefore the answer would be x=47°