You buy a new yoga ball. the ball has a diameter of 26 inches. what is the volume of the ball? use 3.14 for pi. round you answer to the nearest hundredth.

The head librarian at the library of congress has asked her assistant for an interval estimate of the mean number of books checked out each day. the assistant provides the following interval estimate: from 740 to 920 books per day. what is an efficient, unbiased point estimate of the number of books checked out each day at the library of congress?

The number of potato chips in a bag is normally distributed with a mean of 71 and a standard deviation of 2. approximately what percent of bags contain between 69 and 73 potato chips? approximately 68% approximately 71% approximately 95% approximately 99.7%

Adam used 1072.4 gallons of water over the course of 7 days. how much water did adam use, on average, each day?