Ava45018
Ava45018
06-01-2018
Mathematics
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icedipping
icedipping
06-01-2018
We want to find h(t) = 0 because the height is 0 when the projectile hits the ground.
-40t^2 + 200t = 0
40t^2 - 200t = 0
t^2 - 5t = 0
t(t - 5) = 0
So, t = 0 or t = 5. But t = 0 is when the projectile is launched. So, t = 5.
The answer is
C
.
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Аноним
Аноним
06-01-2018
when the projectile is launched and also when it hits the ground h(t) = 0 so we have
-40t^2 + 200t = 0
-40t(t - 5) = o
so t = 0 and t = 5
5 is the times when it land after the flight
answer t seconds.
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