Question

The height of a ball (in meters) `t` seconds after it is thrown is given by `y(t)=-4.9t^2+11.6t+22.5`. From what height was the ball thrown?

Answer 1

The ball was thrown from a height of 22.5 meters.

Explanation:

`y(t)` is the height of the ball at any time `t`.

When thrown initially (when `t=0`), the height will be

`y(0)=-4.9(0)^2+11.6(0)+22.5=22.5`