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2 years ago

What is the result when the number 86 is decreased by 9%?

Mathematics

1 answer:

Vikki [24]2 years ago

6 0

78.26

Hope this helps!!!

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A demand function often expresses the price at which x items can be sold. Typically, the lower the price is, the more items ther

balu736 [363]

I would start at 2000 because of 400/.2 is 2000 idk sorry

5 0

2 years ago

A rugby team played six games.

Schach [20]

Step-by-step explanation:

mean score means the sum of all 6 scores divided by the number of games : 6.

sum6/6 = 15

sum6 = 15×6 = 90

(sum6 + x)/7 = 16

sum6 + x = 16×7 = 112

90 + x = 112

x = 22

they scored 22 points in the 7th game.

3 0

2 years ago

When the sample size and the sample proportion remain the same, a 90 percent confidence interval for a population proportion p w

deff fn [24]

Answer:

A 90% confidence interval for p will be narrower than the 99% confidence interval.

Step-by-step explanation:

The formula to compute the (1 - α) % confidence interval for a population proportion is:

$CI=\hat p\pm z_{\alpha /2}\sqrt{\frac{\hat p(1-\hat p)}{n}}$

Here $\hat p$ is the sample proportion.

The margin of error of the confidence interval is:

$MOE= z_{\alpha /2}\sqrt{\frac{\hat p(1-\hat p)}{n}}$

The MOE is dependent on:

Confidence level
Standard deviation
Sample size

The MOE is directly related to the confidence level and standard deviation.

So if any of the two increases then the MOE also increases, thus widening the confidence interval.

And the MOE is inversely related to the sample size.

So if the sample increases the MOE decreases and vice versa.

It is provided that the sample size and the sample proportion are not altered.

The critical value of z for 90% confidence level is:

$z_{\alpha/2}= z_{0.10/2}=z_{0.05}=1.645$

And the critical value of z for 99% confidence level is:

$z_{\alpha/2}= z_{0.05/2}=z_{0.05}=1.96$

So as the confidence level increases the critical value increases.

Thus, a 90% confidence interval for p will be narrower than the 99% confidence interval.

6 0

2 years ago

The area of a rectangle can be found by multiplying the length by the width. a rectangular postage stamp has a length of nine-te

GaryK [48]

3/4

9/10 times 5/6= 45/60 divide by 3 then divide by 5. 15/20 = 3/4

8 0

2 years ago

In the diagram below, Figure B is a dilation of Figure A.

AVprozaik [17]

B.The two figures are similar

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2 years ago