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3 years ago

20 POINTS PLEASE HELP

Mathematics

1 answer:

victus00 [196]3 years ago

5 0

Answer:

3 dots above $5 + 3 dots above $6 = 6

so 6 babysitters earned $5 or $6 per hour

Step-by-step explanation:

According to the information:

number of dots above 4 dollar=2

number of dots above 5 dollar=3

number of dots above 6 dollar=3

number of dots above 7 dollar=2

Hence, the number of babysitters earned $5 or $6=3+3=6

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There is a bag filled with 5 blue and 4 red marbles.

Delvig [45]

Answer:

8/18=4/9

Step-by-step explanation:

since it there is 1/6 for red marbles and 5/18 for blue marbles it works because it is 8*9=72 for the denominator and 4*3=12 so it is 12/72=1/6 and for blue it is 5/18 because it is 5*4=20 and 20/72=10/36=5/18 so it is 1/6+5/18=8/18=4/9

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2 years ago

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:

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

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

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2 years ago

As a preliminary measure, you want to review only the top 25% of applicants on the basis of of standardized test scores. How doe

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brainly.com/question/25638875

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2 years ago

Roster Method.........

Natalija [7]

Answer:

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2 years ago

6=n-4<br> Ushdhsbdusvdj

kaheart [24]

Answer:

n=10

Step-by-step explanation:

6 = n-4

Add 4 to each side

6+4 = n-4+4

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4 0

3 years ago

Read 2 more answers