PLSSS HELP IF YOU TURLY KNOW THISS:)

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

Which value would be a solution for x in the inequality 47-4x< 7

Which describes the difference between the graph of f(x)=x^2 and g(x)=-(x^2-2)