Which confidence level would produce the widest interval when estimating the mean of a population from the mean and standard deviation of a sample of that population?

loloo

step-by-step explanation:

lololool

step-by-step explanation:

points a and b are equidistant from the desired line, so the line you find by using them will go through point r.

using points other than a and b will give the desired line only if they are equidistant from r. if they are randomly located, the perpendicular line you create will not necessarily go through point r, hence will not be a solution to the problem.

it's undefined because anything multiplied by 0 is 0. that said, 7 days is 168 hours