Alain throws a stone off a bridge into a river below.
The stone's height (in meters above the water), xxx seconds after Alain threw it, is modeled by:
h(x)=-5x^2+10x+15h(x)=−5x
2
+10x+15h, left parenthesis, x, right parenthesis, equals, minus, 5, x, squared, plus, 10, x, plus, 15
What is the height of the stone at the time it is thrown?