Question

. Sean throws a pebble from a bridge into the stream beneath him. The pebble’s height , x seconds after Sean throws it can be modeled by:

h(x)=-5x^2+10x+15
What was the height of the stone at the time that it was thrown?

Answer 1

The height of the pebble when it was thrown is 15 meters.

Step-by-step explanation:

The height of the pebble at the time it was thrown can be found by substituting x = 0 into the height function h(x) = -5x^2 + 10x + 15.

Therefore, the height of the pebble when it was thrown is h(0) = -5(0)^2 + 10(0) + 15 = 15 meters.