which equation has an a-value of –2, a b-value of 1, and a c-value of 3? a. 0 = –2x2 x 3 b. 0 = 2x2 x 3 c. 0 = –2x2 3 d. 0 = 2x2
2 answers:
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Answer:
t = 15.42 s
Step-by-step explanation:
A rocket is launched from a tower. The height of the rocket, y in feet, is related to the time after launch, x in seconds, by the given equation.
We ned to find the time when the rocket will the ground. For this, y = 0
It is a quadratic equation whose solution is given by :
Here, a = -16, b = 242 and c = 73
Neglecting negative value.
So, it will hit the ground in 15.42 s.