If the area of a is 81 times that of b l, what is the ratio of the perimeters?

If the area of A is 81 times that of B l, what is the ratio of the perimeters?
to get the ratio of the perimeters we proceed as follows:
linear scale factor =√(area scale factor)
thus
linear scale factor=√81
linear scale factor=9
thus the ratio of the perimeter is, perimeter of A is 9 times that of B

The best estimate of the proportion of adults who say that the law goes easy on celebrities is 0.7435.

Step-by-step explanation:

Confidence interval concepts:

A confidence interval has two bounds, a lower bound and an upper bound.

A confidence interval is symmetric, which means that the point estimate used is the mid point between these two bounds, that is, the mean of the two bounds.

In this question:

CI is between 0.645 and 0.842. So the best estimate of the proportion is:

(0.645+0.842)/2 = 0.7435

The best estimate of the proportion of adults who say that the law goes easy on celebrities is 0.7435.