Find the area of the composite figure

PLEASE HELP QUICK!!!!!

astra-53 [7]

Answer:

8

Step-by-step explanation:

check this out!

-5(a+3)=- 55

-5a-15=- 55

-5a= -55+15

-5a= -40

-5a/-5 =-40/-5

a=8

4 0

3 years ago

Read 2 more answers

kaitlin buys 9/10 pound of orange slices. she eats 1/3 of them and divides the rest equaly into 3 bags. how much is in each bag

USPshnik [31]

2/10

1/3 of 9/10 would be 3/10

this leaves you with 6/10

divided into 3 bags leaves you with 2/10 in each bag

6 0

3 years ago

Write the fraction of 250,000

sammy [17]

You can write 250,000/1 because in every number if you want to make fraction its always have 1 or put it under that number which is called denominator so the answer would be two hundred and fifty thousand, one: 250,000/1

250,000 will be numerator and 1 will be denominator

7 0

3 years ago

The director of research and development is testing a new medicine. She wants to know if there is evidence at the 0.02 level tha

docker41 [41]

Answer:

The p-value of the test statistic is 0.2019.

Step-by-step explanation:

Test if there is evidence at the 0.02 level that the medicine relieves pain in more than 384 seconds.

At the null hypothesis, we test if it relieves pain in at most 384 seconds, that is:

$H_0: \mu \leq 384$

At the alternative hypothesis, we test if it relieves pain in more than 384 seconds, that is:

$H_1: \mu > 384$

The test statistic is:

$z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}$

In which X is the sample mean, $\mu$ is the value tested at the null hypothesis, $\sigma$ is the standard deviation and n is the size of the sample.

384 is tested at the null hypothesis:

This means that $\mu = 384$

For a sample of 41 patients, the mean time in which the medicine relieved pain was 387 seconds. Assume the population standard deviation is 23.

This means that $n = 41, X = 387, \sigma = 23$

Value of the test statistic:

$z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}$

$z = \frac{387 - 384}{\frac{23}{\sqrt{41}}}$

$z = 0.835$

P-value of the test:

The p-value of the test is the probability of finding a sample mean above 387, which is 1 subtracted by the p-value of z = 0.835.

Looking at the z-table, z = 0.835 has a p-value of 0.7981.

1 - 0.7981 = 0.2019

The p-value of the test statistic is 0.2019.

4 0

3 years ago

The front side of an apartment building is a rectangle 60 feet tall and 25 feet wide bricks cover its surface except for a door

klasskru [66]

Answer:

1399 sq. feet

Step-by-step explanation:

Now, the data given is

height of front of apartment = 60 feet

Width of front of apartment = 25 feet

So total are of front of apartment is = Height x Width

= 60 x 25

= 1500 sq. yards

Now for door

Height = 7 feet

Width = 3 feet

So, total are of door

= Height x Width

= 7 x 3

= 21 sq. yards

Now for each window

Height = 4 feet

Width = 2 feet

So, total are of one window

= Height x Width

= 4 x 2

= 8 sq. yards

Now note that, for 10 windows area will be

= 8 x 10

= 80 sq. yards

Now understand that we have to find the area for bricks, but bricks will cover entire front except the door and windows. So, we have to subtract area of door and windows from total front area of apartment.

Area for bricks = Total front area - (area of door + area of 10 windows)

Area for bricks = 1500 - 21 - 80

Area for bricks = 1399 sq. yards

6 0

3 years ago