4 days ago, Emily blew up a balloon (that is a perfect sphere) to a radius of 5 cm. since then, the balloon, has lost air and decreased by 0.5 cm each day. what is the ratio of the current volume of the balloon to the volume of the balloon 4 days ago?

What is the solution of the systems of equations? y=2/3x+3 x=-2

Complete the solution of the equation. find the value of y when x equals to 1 9x-5y=29

The number of calories you burn depends on your weight. a 110-pound person burns 163 calories during 30 minutes of tennis. find the number of calories that a 190-pound person would burn during the same activity, assuming they burn calories at the same rate.