Can someone please explain how to solve these kinds of questions? I'm v confused

The weekly revenue for a company is r = 3p^2 + 60p + 1060, where p is the price of the company's product. what price will result in a revenue of $1200.

How do i start to solve? would appreciate a walk-thru! a bird sitting 16ft above the ground in an apple tree dislodges an apple. after how many seconds does the apple land on the ground? (assuming that no branches will interfere with it's fall)

Acompany made a profit of 75000 over a period of 6 years on an initial investment of 15000 what is the annual roi