If the simple interest on 5,000 for 3 years is 1,200 then what is the interest rate

I'll give brainliest if you answer right : )

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.

3. a sum of $2700 is to be given in the form of 63 prizes. if the prize is of either $100 or $25, find the number of prizes of each type.