Use Theorem to find ℒ{f(t)}.
f(t) = (et − e−t)2

Answer:

  multiplication

Step-by-step explanation:

The evaluation of ...

  13 -2·3 +4/4 +4

starts with the multiplication, because there are no exponents or parentheses.

  13 -6 +4/4 +4

Next is the division:

  13 -6 +1 +4

Finally, the addition and subtraction:

  7 +1 +4

  8 +4

 12

_____

We have assumed your x is not a variable, but is intended to indicate multiplication. We have also assumed that your "divided by" implies no particular grouping, so that the numerator is the first preceding number and only the first following number is in the denominator.

Answer:

The sample size is  [tex]n =419[/tex]

Step-by-step explanation:

From the question we are told that

    The population proportion is  [tex]p = 0.45[/tex]

     The  margin of error is  [tex]E = 0.04[/tex]

Given that the confidence level is  90%

  Then the level of significance can be mathematically represented as

          [tex]\alpha = 100 -90[/tex]

          [tex]\alpha = 10\%[/tex]

         [tex]\alpha = 0.10[/tex]

Next we obtain the level of significance from the normal distribution table the value is    

             [tex]Z_{\frac{\alpha }{2} } = 1.645[/tex]

   Generally the sample size is mathematically represented as  

        [tex]n = [ \frac{Z_{\frac{\alpha }{2} }}{E} ]^2 * p(1- p )[/tex]

substituting values

         [tex]n = [ \frac{1.645 }{0.04} ]^2 * 0.45(1- 0.45 )[/tex]

        [tex]n =419[/tex]

Answer:

  2

Step-by-step explanation:

The parallel line will have the same coefficients, but a constant suited to the given point:

  x + 3y = constant

That is, A=1, B=3, so B-A = 2.

___

The constant for the parallel line will be -1.

Answer:

The answer is Plane P

Step-by-step explanation:

The reason for the answer is because a closed, two-dimensional or flat figure is called a plane shape. Different plane shapes have different attributes, such as the numbers of sides or corners. A side is a straight line that makes part of the shape, and a corner is where two sides meet.

Answer:

a. 0.40198

b. 0.36049

c. 0.20046

Step-by-step explanation:

To solve for this we make use of the z score formula.

z-score formula is

z = (x-μ)/σ,

where

x is the raw score

μ is the population mean

σ is the population standard deviation.

a. Compute the probability of a value between 75.0 and 90.0.

For x = 75

From the question, we know that

mean of 80.0 and a standard deviation of 14.0.

z = (x - μ)/σ

z = 75 - 80/ 14

z = -0.35714

Using the z score table to find the probability

P-value from Z-Table:

P(x = 75) = P(z = -0.35714)

= 0.36049

For x = 90

z = 90 - 80/14

z = 0.71429

Using the z score table to find the probability

P-value from Z-Table:

P(x = 90) = P(z = 0.71429)

= 0.76247

The probability of a value between 75.0 and 90.0 is:

75 < x < 90

= P( x = 90) - P(x = 75)

= 0.76247 - 0.36049

= 0.40198

Therefore, probability of a value between 75.0 and 90.0 is 0.40198

b. Compute the probability of a value of 75.0 or less.

For x = 75

From the question, we know that

mean of 80.0 and a standard deviation of 14.0.

z = (x - μ)/σ

z = 75 - 80/ 14

z = -0.35714

Using the z score table to find the probability

P-value from Z-Table:

P(x ≤ 75) = 0.36049

c. Compute the probability of a value between 55.0 and 70.0.

For x = 55

From the question, we know that

mean of 80.0 and a standard deviation of 14.0.

z = (x - μ)/σ

z = 55 - 80/ 14

z = -1.78571

Using the z score table to find the probability

P-value from Z-Table:

P(x = 55) = P(z = -1.78571)

= 0.037073

For x = 70

z = 70 - 80/14

z = -0.71429

Using the z score table to find the probability

P-value from Z-Table:

P(x = 70) = P(z = -0.71429)

= 0.23753

The probability of a value between 55.0 and 70.0 is:

55 < x < 70

= P( x = 70) - P(x = 55)

= 0.23753 - 0.037073

= 0.200457

Approximately to 4 decimal place = 0.20046

Step-by-step explanation:

the answer for 6y+21+7=4y−20+5y is

y =16

Answer:

Step-by-step explanation:

[tex] \sf{6x - 7(4 - 5)}[/tex]

Distribute 7 through the parentheses

[tex] \sf{6x - 28 + 35}[/tex]

Calculate

[tex] \sf{6x + 7}[/tex]

Hope I helped!

Best regards!!

Answer:

(5/3 x - k)/c  =b

Step-by-step explanation:

x = 3 / 5 (cb+k)

Multiply each side by 5/3

5/3x =5/3* 3 / 5 (cb+k)

5/3x = (cb+k)

Subtract k

5/3 x - k = cb +k-k

5/3 x - k = cb

Divide by c

(5/3 x - k)/c  = cb/c

(5/3 x - k)/c  =b

Step-by-step explanation:

Hey, there!!

Principal (p) = 4000

Time = 3/2= 1.5 yrs.

rate = 10%

Now, we have formula,

[tex]c.a = p \times {(1 + \frac{r}{100}) }^{t} [/tex]

Putting their values,

[tex]ca = 4000\times {(1 + \frac{10}{100} )}^{1.5} [/tex]

[tex]ca =4000 \times {(1 + 0.1)}^{1.5} [/tex]

[tex]ca = 4000 \times 1.153689[/tex]

Simplifying them we get,

C.A = 4614.75

Hope it helps...

Answer: y=x³+2 or f⁻¹(x)=x³+2

Step-by-step explanation:

To find the inverse of the radical function, we replace y with x and x with y. Then, you solve for y.

[tex]y=\sqrt[3]{x-2}[/tex]                        [replace y with x and x with y]

[tex]x=\sqrt[3]{y-2}[/tex]                        [cube both sides to cancel out the cubed root]

[tex]x^3=y-2[/tex]                          [add both sides by 2]              

[tex]x^3+2=y[/tex]

Now that we have switched the variables and solved for y, we know that the inverse function is y=x³+2 or f⁻¹(x)=x³+2.

Answer:

f^-1(x)=x^3+2

Step-by-step explanation:

Answer:

D) x + y ≤ -4

    3x + 2y ≤ -5

Step-by-step explanation:

Step(i):-

we will choose the system of inequalities

                                             x + y ≤ -4

                                            3x + 2y ≤ -5

                                          x + y = -4 ...(i)

                                         3x + 2y = -5..(ii)

Multiply equation (i) with '3'

                                    3x + 3y = -12

                                    3x  + 2 y = -5

                                   -      -           +

                                    0 +  y =    -7              

Step(ii):-                              

Substitute   y  = -7  in equation (i)

                        x + y = -4

                       x - 7 = -4

                         x = -4 + 7

                        x = 3

The solution of the given inequalities is ( 3, -7)

Answer:

Step-by-step explanation:

[tex] \mathsf{ \frac{x}{4} = 2}[/tex]

Apply cross product property

[tex] \mathsf{x \times 1 = 2 \times 4}[/tex]

Calculate

[tex] \mathsf{x = 8}[/tex]

Hope I helped!

Best regards!

Answer:

[tex] \frac{x}{4} = 2[/tex]

X=2

Step-by-step explanation:

4•x/4=2•4

X=8

Answer:

d) $146.15

Step-by-step explanation:

From the above Question, we are given the following values:

The annual dividend per share of a perpetual preferred stock = $9.50

The required return rate on this preferred stock = 6.5% = 0.06

The selling price of the stock = ??

The formula to calculate the Selling price of the stock =

Annual dividend per share / Required return rate

= $9.5/ 0.065

= $146.15384615

Approximately $146.15

Therefore, the price at which the stock should sell is $146.15.

Answer:

C.

Step-by-step explanation:

Since the radius of the circle is 12 units, we can calculate the circumference.

2 * pi * r = 2 * pi * 12 = 24 * pi = 24pi.

The arc angle is 240 degrees, and the whole circle would be 360 degrees. So, we can set up an equation.

[tex]\frac{24\pi }{360} =\frac{x}{240}[/tex]

[tex]\frac{24\pi }{6} =\frac{x}{4}[/tex]

[tex]\frac{4\pi }{1} =\frac{x}{4}[/tex]

1 * x = 4 * 4 * pi

x = 16pi

So, your answer is C.

Hope this helps!

Answer:

Hence, the equation of the line that passes through the points (8,0) and (-9,-9) is [tex]y =\frac{9x}{17} - \frac{72}{17}[/tex].

Step-by-step explanation:

We have to find the equation of the line that passes through the points (8,0) and (-9,-9).

Let the two points be ([tex]x_1,y_1[/tex]) = (8, 0) and ([tex]x_2, y_2[/tex]) = (-9, -9).

Now, we will find the two-point slope using the above two points, i.e;

Slope =  [tex]\frac{y_2-y_1}{x_2-x_1}[/tex]

          =  [tex]\frac{-9-0}{-9-8}[/tex]  =  [tex]\frac{9}{17}[/tex]

Now, the equation of the line using one of the point, let's say ([tex]x_1,y_1[/tex]) = (8, 0) is given by;

[tex]y - y_1 = \text{Slope} \times (x - x_1)[/tex]

[tex]y - 0 =\frac{9}{17} \times (x - 8)[/tex]

[tex]y =\frac{9x}{17} - \frac{72}{17}[/tex]

Hence, the equation of the line that passes through the points (8,0) and (-9,-9) is [tex]y =\frac{9x}{17} - \frac{72}{17}[/tex].

Answer:

The length of segment XZ is 15 units

Step-by-step explanation:

Given

[tex]XY = 5[/tex]

[tex]YZ = 10[/tex]

Required

Determine XZ

Assuming XY and YZ are on the same plane such that

[tex]XZ = XY + YZ[/tex]

Substitute values for XY and YZ

[tex]XZ = 5 + 10[/tex]

[tex]XZ = 15[/tex]

Hence, the length of segment XZ is 15 units

Hi

1 mile = 5280 feet  

at  90 mile per hour, you have  5280 *90  = 475 200 feets  

an hour is  60*60 = 3600 second  

so in 1 second the train travel  :  475 200 /3600 = 4752 /36 = 132 feets

so in 10 seconds  :  132*10 = 1320 feets.

The feet train travel in 10 seconds is  1,320 feet .

The unitary method is a technique for solving a problem by first finding the value of a single unit, and then finding the necessary value by multiplying the single unit value.

According to the question

Train traveling at a constant speed = 90 miles per hour

1 mile = 5280 feet  

By using unitary method:

feet does it travel in 1 seconds = [tex]\frac{90*5280}{60*60}[/tex]  

feet does it travel in 10 seconds = [tex]\frac{90*5280}{60*60} * 10[/tex]

                                                      = 1,320 feet

Hence, the feet train travel in 10 seconds is  1,320 feet .

To know more about unitary method  here:

https://brainly.com/question/22056199

#SPJ3

Answer:

Length of each pieces= 1/8 inch

Step-by-step explanation:

Length of metal rod= 51/64 inch

1/64 was cut from one end and 1/32 was cut from the other end

Total cut out= 1/64 + 1/32

Total cut out= (1+2)/64

Total cut out= 3/64 inch

Length remaining= 51/64-3/64

Length remaining= 48/64 inch

So the remaining length was cut into six pieces.

Length of each pieces= (48/64) * 1/6

Length of each pieces= 8/64

Length of each pieces= 1/8 inch

Answer:

Had Picked

Step-by-step explanation:

Answer:

No

Step-by-step explanation:

Assuming that the x- and y- axes are respectively horizontal and vertical, a vertical line has an undefined slope and cannot be diagonal.

Note that only a diagonal line can have a slope defined.

Let

[tex]A=B=\begin{bmatrix}0&1\\1&0\end{bmatrix}[/tex]

Then

[tex]AB=BA=\begin{bmatrix}0&1\\1&0\end{bmatrix}^2=\begin{bmatrix}1&0\\0&1\end{bmatrix}[/tex]

Complete Question

The mean height of women in a country (ages 20-29) is 64.4 inches. A random sample of 75 women in this age ground is selected. what is the probability that the mean height for the sample is greater than 65 inches? assume [tex]\sigma = 2.97[/tex]

Answer:

The value is  [tex]P(X > 65) = 0.039715[/tex]

Step-by-step explanation:

From question we are told that

  The mean is [tex]\mu = 64.4 \ inches[/tex]

  The  sample size is  [tex]n = 75[/tex]

The probability that the mean height for the sample is greater than 65 inches is mathematically represented as

     [tex]P(X > 65) = P[\frac{X - \mu }{ \sigma_{\= x} } > \frac{65 - 64.4 }{ \sigma_{\= x} } ][/tex]

Where  [tex]\sigma _{\= x }[/tex] is the standard error of mean which is evaluated as

     [tex]\sigma_{\= x } = \frac{\sigma}{\sqrt{n} }[/tex]

=>   [tex]\sigma_{\= x } = \frac{2.97}{\sqrt{75} }[/tex]

=>    [tex]\sigma_{\= x } = 0.343[/tex]

Generally [tex]\frac{X - \mu }{ \sigma_{\= x } } = Z(The \ standardized \ value \ of \ X )[/tex]

       [tex]P(X > 65) = P[Z> \frac{65 - 64.4 }{0.342 } ][/tex]

So  

    [tex]P(X > 65) = P[Z >1.754 ][/tex]

From the z-table  the value of  

     [tex]P(X > 65) = P[Z >1.754 ] = 0.039715[/tex]

     [tex]P(X > 65) = 0.039715[/tex]

The third column is optional/extra. It's to show which data values fit in what specific class limit interval.

===================================================

Explanation:

Imagine we had a bunch of cards. Each card will have a number that is from the data set {70, 88, 103, 64, ... etc}

The goal is to sort the cards into 7 boxes. The first box is labeled "60 through 66", the next is "67 through 73", etc.

The first box has 4 cards placed inside it because we have the values {64,65,60,60 } which fit the interval from 60 through 66. Therefore the frequency here is 4.

The next box has the cards labeled {70,69,71,72,70 } inside it. We have 5 cards here, so the frequency is 5.

This pattern is kept up until all of the cards have been sorted into the proper boxes.

What you'll end up with is what you see in the image below. It shows the table of class limits with their corresponding frequencies. I have added a third column to show which values go where, which is optional and likely something you wont put as your answer to the teacher. This third column is just something for you to help keep track of everything.

Answer:

15

Step-by-step explanation:

a^2 + b^2 = c^2

9=a

12-b

Plug in the numbers

Answer:

[tex] \boxed{ \bold{ \huge{ \boxed{ \sf{a = 8}}}}}[/tex]

Step-by-step explanation:

[tex] \sf{4a + 10 = 2a + 26}[/tex]

Move 2a to left hand side and change it's sign

Similarly, move 10 to right hand side and change it's sign

⇒[tex] \sf{4a - 2a =26 - 10}[/tex]

Collect like terms

⇒[tex] \sf{2a = 26 - 10}[/tex]

Subtract 10 from 26

⇒[tex] \sf{2a = 16}[/tex]

Divide both sides of the equation by 2

⇒[tex] \sf{ \frac{2a}{2} = \frac{16}{2} }[/tex]

Calculate

⇒[tex] \sf{a = 8}[/tex]

Hope I helped!

Best regards!!

Answer:

The  probability is  [tex]P(X < 20 ) = 0.68807[/tex]

Step-by-step explanation:

From the question we are told that

     The proportion of  total part-time workforce is  [tex]\r p = 0.221[/tex]

     The  sample  size is  n  =  80  

Generally the mean is mathematically represented as

         [tex]\mu = n* p[/tex]

          [tex]\mu = 0.221 * 80[/tex]

        [tex]\mu = 17.68[/tex]

The  proportion of not part - time   workforce

      [tex]q = 1- p[/tex]

=>   [tex]q = 1- 0.221[/tex]

=>   [tex]q = 0.779[/tex]

The  standard deviation is mathematically represented as

     [tex]\sigma = \sqrt{ 80 * 0.221 * 0.779 }[/tex]

     [tex]\sigma = 3.711[/tex]

Now  applying the normal approximation,

Then the  probability that fewer than 20 people from this sample were between the ages of 25 and 34 is mathematically represented as

     [tex]P(X < 20 ) = P( \frac{X - \mu }{ \sigma } < \frac{ 20 - 17.68 }{ 3.711} )[/tex]

Applying  continuity correction

     [tex]P(X < 20 ) = P( \frac{X - \mu }{ \sigma } < \frac{ (20-0.5 ) - 17.68 }{ 3.711} )[/tex]

       [tex]P(X < 20 ) = P( \frac{X - \mu }{ \sigma } < \frac{ (20-0.5 ) - 17.68 }{ 3.711} )[/tex]

      [tex]P(X < 20 ) = P( \frac{X - \mu }{ \sigma } < 0.4904 )[/tex]

Generally

      [tex]\frac{X - \mu }{ \sigma } = Z ( The \ standardized \ value \ of \ X )[/tex]

So  

    [tex]P(X < 20 ) = P( Z< 0.4904 )[/tex]

From the z-table  

        [tex]P( Z< 0.4904 ) = 0.68807[/tex]

The probability is  

         [tex]P(X < 20 ) = 0.68807[/tex]

Answer:

his weekly exercise time goal in minutes = 200 minutes

Step-by-step explanation:

Jerry has reached 39% of his weekly exercise time goal.

so far this week ,he has exercise for a total of 78 minutes this week.

39% of total = 78 minutes

100%= x

X=100*78/39

X=100*2

X= 200 minutes

his weekly exercise time goal in minutes = 200 minutes

Answer:

32,768

Step-by-step explanation:

Remember to follow PEMDAS.

First, solve for the exponents for both terms:

[tex]4^6 = 4 * 4 * 4 * 4 * 4 * 4 = 4096[/tex]

[tex]2^3 = 2 * 2 * 2 = 8[/tex]

Multiply the two terms together:

[tex]4096 * 8 = 32768[/tex]

32,768 is your answer.

~

Answer:

4.5 divided by 0.5=9

9 times 5=45

45 feet

Step-by-step explanation:

Answer:

45 feet

Step-by-step explanation:

Set up a proportion:

[tex]\frac{0.5}{5}[/tex] = [tex]\frac{4.5}{x}[/tex]

Cross multiply:

0.5x = 22.5

x = 45

= 45 feet

Step-by-step explanation:

1.

Point M is the bisector of AB

AM = 13...(given)

Therefore, AB = 2AM = 2* 13 = 26

2.

Ray MC is the bisector of AB

AM = 8...(given)

Therefore, AB = 2AM = 2* 8 = 16

3.

Line l is the bisector of angle AB.

BM = 26...(given)

Therefore, AB = 2BM = 2* 26 = 52