SOLUTION: a ball is thrown from an initial height of 1 meter with an initial upward velocity of 15 m/s. The balls height h (in meters) after t seconds is given by the following. h=1+15t-5t

Algebra ->  Rate-of-work-word-problems -> SOLUTION: a ball is thrown from an initial height of 1 meter with an initial upward velocity of 15 m/s. The balls height h (in meters) after t seconds is given by the following. h=1+15t-5t      Log On


   



Question 1150442: a ball is thrown from an initial height of 1 meter with an initial upward velocity of 15 m/s. The balls height h (in meters) after t seconds is given by the following.
h=1+15t-5t^2
find all values of t for which the balls height is 6 meters.
round answer to nearest hundredth.
if someone could help provide answer

Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
h=1+15t-5t^2 = 6
5t^2 - 15t + 5 = 0
Solve for t
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You get 2 times, 1 ascending, 1 descending.