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3 years ago

A rectangle is 25 feet long its area 375 square feet. What is the perimeter of the rectangle

Mathematics

1 answer:

Oliga [24]3 years ago

4 0

Area = length x width.

Divide the area by the length of find the width.

Width = 375/25 = 15 feet.

The perimeter is the sum

Of the 4 sides.

Perimeter = 25 + 25 + 15 + 15 = 80 feet.

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scoray [572]

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3 years ago

a gallon jug of milk is 3/4 full. After breakfast the jug is 1/12 full. Find the difference of the amounts before breakfast and

Marrrta [24]

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3 years ago

Read 2 more answers

Assume that when adults with smartphones are randomlyâ€‹ selected, 63â€‹% use them in meetings or classes. If 7 adult smartphone

nlexa [21]

Answer:

5.78% probability that exactly 2 of them use their smartphones in meetings or classes.

Step-by-step explanation:

For each adult, there are only two possible outcomes. Either they use their smarthphone in meetings or classes, or they do not. The probability of an adult using their smartphone on meetings or classes is independent of other adults. So we use the binomial probability distribution to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

In which $C_{n,x}$ is the number of different combinations of x objects from a set of n elements, given by the following formula.

$C_{n,x} = \frac{n!}{x!(n-x)!}$

And p is the probability of X happening.

63% use them in meetings or classes.

This means that $p = 0.63$

7 adult smartphone users are randomly selected

This means that $n = 7$

Find the probability that exactly 2 of them use their smartphones in meetings or classes.

This is P(X = 2).

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

$P(X = 2) = C_{7,2}.(0.63)^{2}.(0.37)^{5} = 0.0578$

5.78% probability that exactly 2 of them use their smartphones in meetings or classes.

8 0

3 years ago

Will someone just correct this for me IT EXTRA CREDIT FOR ME

cestrela7 [59]

Answer:

6sqrt(3)

Step-by-step explanation:

Think of the square root like a variable

sqrt(3) *5 + sqrt(3)

Factor it out

sqrt(3)(5+1)

sqrt(3) (6)

6sqrt(3)

8 0

3 years ago

Becky needs to choose a new cell phone plan. She has 2 choices. Carolina Cell offers a monthly fee of $20.79 and $2.00 for each

Paladinen [302]

Answer:

4.2 gigabytes

Step-by-step explanation:

To find the answer, you need to write an equation where the cost of Carolina Cell is equal to the cost of Sanford Cell:

20.79+2x=22.89+1.50x, where x is the number of gigabytes used.

Now, you can solve for x:

2x+1.50x=22.89-20.79

0.5x=2.1

x=2.1/0.5

x=4.2

According to this, the answer is that both plans would cost the same when 4.2 gigabytes are used.

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3 years ago