What adds together to make 18 and multiplies to make 30

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

What is the quadric regression equation that fits these data

15 and 14.7 are 1 apart, so 15 – 14.7 must be 1.