Can anyone help me with this question please.

Using the quadratic formula find the zeros of the given polynomial -5x^2+3x-11

At the beginning of year 1, carlos invests $600 at an annual compound interest rate of 4%. he makes no deposits to or withdrawals from the account. which explicit formula can be used to find the account's balance at the beginning of year 5? what is, the balance?

Aramp rises 4 feet over a distance of 10 feet. what is the length of the ramp?