SOLUTION: A stunt diver jumps from the top of a 40-meter platform. The diver's height above the water can be modeled by the function h=-5t^2+10t+40, where h is height in meters and t is time

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Question 611773: A stunt diver jumps from the top of a 40-meter platform. The diver's height above the water can be modeled by the function h=-5t^2+10t+40, where h is height in meters and t is time in seconds. Find the time it takes the diver to reach the water.
Answer by Alan3354(31487) About Me  (Show Source):
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A stunt diver jumps from the top of a 40-meter platform. The diver's height above the water can be modeled by the function h=-5t^2+10t+40, where h is height in meters and t is time in seconds. Find the time it takes the diver to reach the water.
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He reaches the water when h = 0
h=-5t^2+10t+40
-5t^2+10t+40 = 0
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Solve for t
Ignore the negative solution.