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OpenStudy (anonymous):
A ball is kicked into the air from the top of a building. Its height, in metres, after t seconds is modelled by the function....
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OpenStudy (anonymous):
\[the function... h(t) = -4.9t ^{2} + 19.6t + 34.3 \]
OpenStudy (anonymous):
what was the height of the ball after 5 secs?
OpenStudy (anonymous):
just substitue 5 in the equation, we hav, -4.9(5)^2+19.6(5)+34.3=9.8 m
OpenStudy (anonymous):
i did that... but it was marked as wrong :P guess i was right!
OpenStudy (anonymous):
yes you were
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