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stepladder [879]

3 years ago

7

Sarah wants to find the area of a rectangle. she knows the length of the rectangle is 9 inches. what else does she need to know?

1 answer:

Veseljchak [2.6K]3 years ago

4 0

Area of a rectangle can be found with the formula:
Area = length × width

If Sarah knows the length, she should know the width in order to find out the area of the rectangle.

Answer: width

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Which choice provides the best evidence for the

Likurg_2 [28]

The correct option in A.

Lines 20-21 ("Nobody . . . died")

<h3>Briefing:</h3>

Nobody has succeed in this thing , and many have died.

This line belong to the 20-21 line for the phrase When fictional Swedish scientist went to the north pole for set up hydrogen- powered balloon.

<h3>Who is Swedish scientist ?</h3>

Only hydrogen offers helium-like lift; in fact, hydrogen offers 7-8% more lift than any other gas. In atmospheric sounding balloons outside of North America, hydrogen is frequently employed.

<h3>What is hydrogen- powered balloon?</h3>

Arrhenius, who was originally a physicist but is frequently referred to as a chemist, was one of the pioneers of the field of physical chemistry. He was the first Swedish Nobel laureate when he won the Chemistry Prize in 1903.

<h3>Why did they stop using hydrogen in balloons?</h3>

Despite being lighter than air, hydrogen is flammable, and since oxygen is present in the air, there is a chance of an explosion and fire. Since helium is a non-combustible gas and lighter than air, it is frequently used to fill balloons.

To know more about Passage visit:

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5 0

1 year ago

Assume a Poisson random variable has a mean of 5 successes over a 125-minute period.

goldenfox [79]

Answer:

a

$\mu = 25$

b

$\lambda =0.04$

c

$P(X > 65 ) =0.0742$

Step-by-step explanation:

From the question we are told that

The number of success is n = 5

The time duration is N = 125 minutes

Generally the mean of the random variable is mathematically represented as

$\mu = \frac{N}{n}$

=> $\mu = \frac{125}{5}$

=> $\mu = 25$

Generally the rate parameter is mathematically represented as

$\lambda = \frac{1}{\mu}$

=> $\lambda = \frac{1}{25}$

=> $\lambda =0.04$

Generally the cumulative distribution function for exponential distribution function is

$F(x) = \left \{0 \ \ \ \ \ \ x \le 0}} \atop {1 -e^{-\lambda t }\ x>0}} \right.$

Generally the probability that the time to success will be more than 63 minutes is mathematically represented as

$P(X > 65 ) = 1 - P(X \le 65)$

Here

$P(X \le 65) = 1 -e^{-65 * \lambda }$

=> $P(X \le 65) = 1 -e^{-65 * 0.04 }$

=> $P(X \le 65) = 0.92573$

So

$P(X > 65 ) = 1 - 0.92573$

$P(X > 65 ) =0.0742$

7 0

3 years ago

Find the slope and y-intercept<br><br> a. y = -5x + 3<br> b. y = 1/ 4x - 6<br> c. y=+5

Liula [17]

Answer:

a. Slope= -5 y-intercept = 3

b. Slope = 1/4 y-intercept=-6

c.Slope=0 y-intercept =5

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

Find the volume of this composite solid.

Zina [86]

For this case we have that the figure shown is composed of a cylinder and a cone.

We have that the volume of a cylinder is given by:

$V = \pi * r ^ 2 * h$

Where:

A: It's the radio

h: It's the height

Substituting the values:

$V = \pi * (5) ^ 2 * 10\\V = \pi * 25 * 10\\V = 250 \pi \ m ^ 3$

On the other hand, the volume of a cone is given by:

$V = \frac {\pi * r ^ 2 * h} {3}$

Where:

A: It's the radio

h: It's the height

Substituting the values:

$V = \frac {\pi * (5) ^ 2 * 4} {3}\\V = \frac {\pi * 25 * 4} {3}\\V = \frac {100 \pi} {3} \ m ^ 3$

Then, the total volume is:

$V_ {t} = 250 \pi \ m ^ 3 + \frac {100 \pi} {3} \ m ^ 3$

Taking $\pi = 3.14$ , we have to:

$V_ {t} = 889.67 \ m ^ 3$

Answer:

Option D

5 0

3 years ago

A rock is thrown from a building the distance, in feet between the rock and ground x seconds after it is thrown is given by f(x)

Solnce55 [7]

Yes sirrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr

6 0

3 years ago