SOLUTION: A projectile is fired vertically upward and its height h in meters after t seconds is given by the formula : h = 40t - 8t^2. Find the time taken by the projectile to first reach a
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-> SOLUTION: A projectile is fired vertically upward and its height h in meters after t seconds is given by the formula : h = 40t - 8t^2. Find the time taken by the projectile to first reach a
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Question 1119456: A projectile is fired vertically upward and its height h in meters after t seconds is given by the formula : h = 40t - 8t^2. Find the time taken by the projectile to first reach a height of 48 meters Answer by Shin123(626) (Show Source):
You can put this solution on YOUR website! Plug in 48 for h,
48=40t-8t^2
8t^2-40t=-48
8t^2-40t+48=0
(2t-4)(4t-12)=0
T equals 2 or 3. Both fit in the equation.
