All categories

3 years ago

I'm not sure how to do this. Help please?

Mathematics

1 answer:

OLEGan [10]3 years ago

7 0

The area is 65 m squared

You might be interested in

Researchers are studying the distribution of subscribers to a certain streaming service in different populations. From a random

Katen [24]

Answer:

$CI = (0.17 - 0.27)\± 1.65\sqrt{\frac{(0.17)*(0.83) + (0.27)*(0.73)}{200}}$

Step-by-step explanation:

Given

$n = 200$

$x_1 = 34$ -- City C

$x_2 = 54$ --- City K

Required

Determine the 90% confidence interval

This is calculated using:

$CI = \bar x \± z\frac{\sigma}{\sqrt n}$

Calculating $\bar x$

$\bar x = \bar x_1 - \bar x_2$

$\bar x = \frac{x_1}{n} - \frac{x_2}{n}$

$\bar x = \frac{34}{200} - \frac{54}{200}$

$\bar x = 0.17 - 0.27$

For a 90% confidence level, the z-score is 1.65. So:

$z = 1.65$

Calculating the standard deviation $\sigma$

$\sigma = \sqrt{(\bar x_1)*(1 - \bar x_1) + (\bar x_2)*(1 - \bar x_2) }$

So:

$\sigma = \sqrt{(0.17)*(1 - 0.17) + (0.27)*(1 - 0.27) }$

$\sigma = \sqrt{(0.17)*(0.83) + (0.27)*(0.73)}$

So:

$CI = (0.17 - 0.27)\± 1.65\frac{\sqrt{(0.17)*(0.83) + (0.27)*(0.73)}}{\sqrt {200}}$

$CI = (0.17 - 0.27)\± 1.65\sqrt{\frac{(0.17)*(0.83) + (0.27)*(0.73)}{200}}$

7 0

2 years ago

What is the value of x enter your answer in the Box

Dimas [21]

61.4 is the value of x

7 0

2 years ago

Jamie owns 150 baseball cards. Mason owns 96 baseball cards. What the number of Mason's cards written as a percent of Jamie's ca

Marina CMI [18]

Answer:

64%

95/150 Or 64%

7 0

2 years ago

Read 2 more answers

There were about 1.22 million Hispanic-owned businesses in 2012 and 1.73 million in 2017.

fredd [130]

Answer:

f(t) = 1.22·(173/122)^(t/5)

Step-by-step explanation:

(a) An exponential growth (or decay) function can be written using the form ...

f(t) = (initial value)·(ratio in period)^(t/period)

Here, we're given an initial value of 1.22, a growth ratio of 1.73/1.22 in a period of 5 years, so we can write the function as ...

f(t) = 1.22·(173/122)^(t/5)

(b) In 2038-2012 = 26 years, the value of the function is ...

f(26) = 1.22·(173/122)^(26/5) ≈ 7.50 . . . . million

3 0

2 years ago

ABC ~ADEF

Mandarinka [93]

Answer:

Step-by-step explanation:

EF = is 1/3 of 15

Since the triangles are similar, then the perimeters are similar.

The perimeter of EDF is 12

The perimeter of ABC should be 3 times as large.

3*12 = 36

The perimeter of ABC = 36

4 0

2 years ago