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Mathematics, 22.10.2020 18:01 live4dramaoy0yf9

NASA launches a rocket at t
=
0
seconds. Its height, in meters above sea-level, as a function of time is given by
h
(
t
)
=
−
4.9
t
2
+
70
t
+
290
.
The rocket splashes down after
seconds

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NASA launches a rocket at t
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