Help what is the quadratic equation because I think I did it wrong

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 set does not contain -3 the set of all real numbers the set of all integers the set of all whole numbers the set of all rational numbers

Two consecutive negative integers have a product of 30. what are the integers?