
Ricky threw a ball upwards such that the height of the ball , h centimetres from the ground , t seconds after it was thrown , is given by the equation h = 20 + t + t². State the height above the ground from which the ball was thrown.

Ricky threw a ball upwards such that the height of the ball , h centimetres from the ground , t seconds after it was thrown , is given by the equation h = 20 + t + t². State the height above the ground from which the ball was thrown.