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Mathematics, 04.12.2020 09:10 11needhelp11

Alain throws a stone off a bridge into a river below. The stone's height (in meters above the water), X seconds after Alain threw it, is modeled by:
h(x) = -5x^2+ 10x + 15
How many seconds after being thrown will the stone hit the water?
seconds
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Alain throws a stone off a bridge into a river below. The stone's height (in meters above the wat

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