3 years ago

22 is 40% of what number? 0)

Mathematics

1 answer:

Greeley [361]3 years ago

3 0

Step-by-step explanation:

22÷0.4 = 55

55 ×0.4 = 22

answer: 55

You might be interested in

Pls help middle school math

uranmaximum [27]

Given ,

5<x<10 and 8<y<19

For y-x,

8-5<y-x<19-10

3<y-x<9

8 0

3 years ago

What is 0.65 as a percentage

Ksivusya [100]

65 percent thats your answer when you convert the number easy as that<span />

4 0

3 years ago

Read 2 more answers

Help please, thank you! :)

gayaneshka [121]

I think it would be 100°

7 0

4 years ago

Read 2 more answers

AARP reported on a study conducted to learn how long it takes individuals to prepare their federal income tax return (AARP Bulle

Crank

Answer:

Confidence interval: (30.1,36.9)

Step-by-step explanation:

We are given the following data set:

35.3,30.5,37.4,26.5,13.0,49.9,28.8,44.0,61.6,0.5,40.5,34.9,47.9,36.6,24.1,39.8,47.8,18.5,36.6,39.2,14.5,37.3,40.5,49.3,45.5,28.3,19.5,5.6,52.6,41.4,45.3,39.0,33.7,29.4,14.5,40.1,33.7,36.9,5.6,33.7

Formula:

$\text{Standard Deviation} = \sqrt{\displaystyle\frac{\sum (x_i -\bar{x})^2}{n-1}}$

where $x_i$ are data points, $\bar{x}$ is the mean and n is the number of observations.

$Mean = \displaystyle\frac{\text{Sum of all observations}}{\text{Total number of observation}}$

$Mean =\displaystyle\frac{1339.9}{40} = 33.5$

$S.D = 11$ (given)

n = 40

Confidence interval:

$\mu \pm z_{critical}\frac{\sigma}{\sqrt{n}}$

Putting the values, we get,

$z_{critical}\text{ at}~\alpha_{0.05} = 1.96$

$33.5 \pm 1.96(\frac{11}{\sqrt{40}} ) = 6.34 \pm 3.4 = (30.1,36.9)$

6 0

3 years ago

Why does the sum of -4 and 3 complain more than the sum of -3 and 5

dem82 [27]

The sum of -4 and 3 complain more because its negative

5 0

4 years ago