Question

a volleyball reaches its maximum height of 13 feet 3 seconds after its served which of the following quadratics could model the height of the volleyball over time after its served, select all that apply

Answer 1

The answer is f(X)= -2x^2 + 12x - 5, or the answer is best represented by the second option.

Because if you do, -b/2a, the result you'd get is three which represents the time of the ball after it's served.

Plug that number into the quadratic equation, and you should be getting thirteen as the result.