A. billy should choose 1/3 of 3/4; he’ll earn 1/15 more. b. billy should choose 1/3 of 3/4; he’ll earn 1/20 more.

Use the elimination method to solve the system of equations -x+5y=-4 and 4x+3y=16

The diameter of a ball is 8 in. what is the volume of the ball? use 3.14 for pi. enter your answer as a decimal in the box. round only your final answer to the nearest hundredth.

Find the volume of the solid obtained by rotating the region enclosed by the curves y=1x and y=7^-x about the x-axis. (use symbolic notation and fractions where needed.) volume =