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3 years ago

What is the reverse of add 1

Mathematics

2 answers:

horsena [70]3 years ago

5 0

Answer:

subtract 1

Step-by-step explanation:

the reverse of "add" is to "subtract"

Aleksandr-060686 [28]3 years ago

4 0

Subtract 1

Hope this helps! ;)

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3 years ago

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ماThe circumference of a circle is 7pie m. What is the area of the circle?

Tresset [83]

Answer:

12.25 $\pi$ sq m

Step-by-step explanation:

if circumference is 7 $\pi$ then the diameter is 7

Area = $\pi$ r²

A = (3.5)² $\pi$

A = 12.25 $\pi$

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2 years ago

Write a pair of numbers such that the value of the 7 in the first number is 1000 times the value of the 7 in the second number,

telo118 [61]

Answer-

As infinitely many such possible number pairs can be formed, one of the instances of such pair would be (37000 and 307).

Solution-

Suppose the former one is aaaaa and the later one is bbbbb.

The value of 7 in the former is 1000 times greater than in the later, so let's make it 7000 and 7.

Then the numbers will be in the following form,

a7aaa and bbbb7

Again, the value of 3 in the former is 100 times greater than in the later.

Then the numbers will be in the following form,

37aaa and bb3bb7

Substituting all the a's and b's by 0,

we get, 37000 and 307 is a possible set. Replacing 0 with any number from 1-9, will yield another number pair which will satisfy the conditions.

6 0

3 years ago

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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.

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3 years ago

Which is the correct answer for this?

alukav5142 [94]

Answer:

Step-by-step explanation:

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