The equation h (t) = - 16t2+115t+15 gives the height of a toy rocket, in feet, t seconds after it is launched from a platform.

What is the height of the platform?

The given equation ⇒⇒⇒ h (t) = - 16t² + 115t + 15

Represents the height of a toy rocket, in feet, t seconds after it is launched from a platform.

So, at t = 0 ⇒⇒⇒ h (t) = - 16 * (0) ² + 115 * (0) + 15 = 15

At t = 0 represents the height at the instant of launching the toy rocket and it is equal to the height of the platform.

∴ The height of the platform = 15 feet