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$0.50 If a ball is thrown upwards at 20 ft/sec

  • From Mathematics: Algebra
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  • Due on Mar. 25, 2012
  • Asked on Mar. 25, 2012 at 03:50:49AM
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fisklori
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If a ball is thrown upwards at 20 ft/sec, the height h after t seconds is given by h = -16t2+ 20t. How many seconds does it take for the ball to reach its maximum height, and what is this height? A. time = 5/16 seconds height = 5 and 1/8 feet B. time = - 5/8 seconds height = 6 and 1/4 feet C. time = 5/8 seconds height = 6 and 1/4 feet D. time = - 5/16 seconds height = 5 and 1/8 feet
 

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Preview: ... h = -16t2+ 20t. How many seconds does it take for the ball to reach its maximum height, and what is this height? A ...
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Preview: ... 0. v=h'=-32t+20 = 0 32t=20 t=20/32=5/8 ...
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Preview: ... t seconds is given by h = -16t 2+ 20t. How many sec ...
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