dangolstein03
27.12.2019 •
Mathematics
1. a ball is thrown into the air. the height in feet of the ball can be modeled by the equation h = -16t2 + 20t + 6 where t is the time in seconds, the ball is in the air. when will the ball hit the ground? how high will the ball go?
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Ответ:
Ответ:
So set the equation equal to 0
0 = -16t^2 + 20t + 6
16t^2 - 20t - 6 = 0
2(8t^2 - 10t - 3) = 0
2(4t + 1)(t - 3) = 0
set each factor equal to 0
4t + 1 = 0 t - 3 = 0
4t = -1 t = 3 - how long when the ball hits the ground
t = -1/4 (not valid can't have negative time)
Ответ:
C) 3x^2 + 20x + 12 = 0
Step-by-step explanation: Because it is the right answer