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OpenStudy (anonymous):
H=15+23t-5t^2 how long does it take for the rocket to pass a window 10 m above ground?
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OpenStudy (anonymous):
i really need help
OpenStudy (anonymous):
test tomorrow
OpenStudy (anonymous):
What is H?
OpenStudy (anonymous):
the hight and t the time
OpenStudy (raden):
15+23t-5t^2 = 10 5t^2-23t-5=0 use quadratic formula ...
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OpenStudy (anonymous):
would there be 2 answers?
OpenStudy (anonymous):
I still don't understand the problem. @RadEn could you explain me, please? :p
OpenStudy (raden):
maybe one of be positive and the other be negative, miss for negative value of t
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