SOLUTION: After t sec, the height of a rocket launched straight upward from the ground level with an initial velocity of 76ft/sec can be modeled by the polynomial 76t-16t^2. After how many s
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-> SOLUTION: After t sec, the height of a rocket launched straight upward from the ground level with an initial velocity of 76ft/sec can be modeled by the polynomial 76t-16t^2. After how many s
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Question 899127: After t sec, the height of a rocket launched straight upward from the ground level with an initial velocity of 76ft/sec can be modeled by the polynomial 76t-16t^2. After how many seconds will the rocket reach a height of 18 feet above the launch (that is, equal to +18)? Answer by ewatrrr(24785) (Show Source):
You can put this solution on YOUR website! -16t^2 + 76t = 18
-16t^2 + 76t - 18 = 0
x = 0.25, 4.5
.25sec after launch, rocket reaches 18ft