I don't get it please help it's for math ASAP please help

Me. drysdale earned 906.25 in interest in one year on money that he had deposited in his local bank if the bank paid an interest rate of 6.25% how much money did mr. drysdale deposit

Write the expression 7x^3-28xy^2 as the product of 3 factors

How do i put 3(x+7) in distributive property