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liberstina [14]
3 years ago
15

Answer this please!

Mathematics
1 answer:
S_A_V [24]3 years ago
3 0
After 9 seconds.


(t) = -16t^2 + 1296 // 1296 because that’s the initial height
Now find what value of t makes h(t) equal to 0.

h(t) = 1296 - 16t^2
Use the difference of squares formula
h(t) = (36-4t)(36+4t)
We only take the positive answer, not the negative one (because negative won't make sense here)
36 - 4t = 0
36 = 4t
9 = t
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