The gravitational attraction between two bodies varies inversely as the
square of the distance between them.
If the force of attraction is 64 pounds
when the distance between the bodies
is 9 feet, what is the distance between
them when the force is 36 pounds?

1. a music store marks up the instruments it sells by 30%. a. if the store bought a guitar for $45, what will be its store price? b. if the price tag on a trumpet says $104, how much did the store pay for it? c. if the store paid $75 for a clarinet and sold it for $100, did the store mark up the price by 30%?