In terms of π, what is the volume of the sphere r=60ft

During a bike challenge riders have to collect various colored ribbons each 1/2 mile they collect a red ribbon each eighth mile they collect a green ribbon and each quarter mile they collect a blue ribbion wich colors of ribion will be collected at the 3/4 markrer

What is the y-intercept of the line given by the equation

8. kelly wants to buy a magazine that is $25. later the magazine was marked up an additional 20%. what is the new price?