These answers aren’t right.. anyone know the right answers?

Describe the 2 algebraic methods you can use to find the zeros of the function f(t)=-16t^2+400.

Select the quadratic that has root x = 8 and x = -5

A. use the formula for continuous compounding with the original example: $1000 invested at 2% for 1 year. record the amount to 5 decimal places. use a calculator. b. compare it to the result using the original compound interest formula with n = 365 calculated to 5 decimal places. which has a larger value? explain.