SOLUTION: A tennis ball is tossed vertically upward from a height of 5 metres according to the height equation h= -16t^+21t+5,where h is the height of the tennis ball in metres and t is t

Algebra ->  Quadratic Equations and Parabolas -> SOLUTION: A tennis ball is tossed vertically upward from a height of 5 metres according to the height equation h= -16t^+21t+5,where h is the height of the tennis ball in metres and t is t      Log On


   



Question 1120740: A tennis ball is tossed vertically upward from a height of 5 metres according to the height equation
h= -16t^+21t+5,where h is the height of the tennis ball in metres and t is the time in second.
After how many seconds will the height be 11 meters?

Answer by josgarithmetic(39617) About Me  (Show Source):