The diagram shows a track composed of a rectangle with a semicircle on each end. The area of the rectangle is 3, 200 square meters. What is the perimeter of the track? Use 3.14 for pi.

(the track is 80Meters)

What is the volume of the sphere shown below with a radius of 3?

What is the correlation coefficient between the variables? round to three decimal places. enter your answer in the box

Suppose you are an avid reader and are looking to save money on the cost of books instead of paying about $20 for each book, you decide to look into purchasing a kindle for $120 you can purchase e-books for about $5 each 1. find the slope-intercept equation for the cost of the hard copy of books using x to represent the number of books 2. find the slope-intercept equation for the cost of the kindle with cost of e-books using x to represent the number of books