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A number divided by 7 is 9:

Multiply both sides by 7 to get the answer so it'll be:
x = 63
Answer:
We need a sample size of at least 657.
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of
, and a confidence level of
, we have the following confidence interval of proportions.

In which
z is the zscore that has a pvalue of
.
The margin of error is given by:

45 percent of its claims have errors.
So 
99% confidence level
So
, z is the value of Z that has a pvalue of
, so
.
What sample size is needed if they wish to be within 5 percent of the actual
This is a sample size of at least n, in which n is found when M = 0.05.







We need a sample size of at least 657.
Answer:
9.8
Step-by-step explanation:
<em>updated</em>
9^2=x^2+4^2
9*9=x*x+4*4
81=x*x-16
+16. +16
97=x*x
√97=√x*x
√97=x
So the answer is √97, but the question wants it rounded so it's actually 9.8
Answer:
To find the circumference is Pi(r)^2 so reverse that to get the beginning statement
Step-by-step explanation: