**Answer:**

false

**Step-by-step explanation:**

Formula: c=2r

Circumference= two times pi times radius

The answer is option 2 yw

**Answer:**

a. With 90% confidence the proportion of all Americans who favor the new Green initiative is between 0.6290 and 0.6948.

b. If the sample size is changed, the confidence interval changes as the standard error depends on sample size.

About 90% percent of these confidence intervals will contain the true population proportion of Americans who favor the Green initiative and about 10% percent will not contain the true population proportion.

**Step-by-step explanation:**

We have to calculate a 90% confidence interval for the proportion.

The sample proportion is p=0.6619.

The standard error of the proportion is:

The critical z-value for a 90% confidence interval is z=1.6449.

The margin of error (MOE) can be calculated as:

Then, the lower and upper bounds of the confidence interval are:

The 90% confidence interval for the population proportion is (0.6290, 0.6948).

**Answer:**

18?

**Step-by-step explanation:**

Well uh since it's 2 cakes wouldn't you multiply 9 by 2?

I mean I tried given the little information in the question so

The answer would be

B)Yes,because it passes the vertical line test