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24 February, 23:34

H=39t-5t2 find all the values of t for which the rockets hight is 22 meters

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  1. 25 February, 00:45
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    I believe that for this question you will use the quadratic equation which is: (-b + / - sqrt (b^2-4 (a) (c)) / 2a Plug in - 5=a, 39=b, 22=c and that should give you 2 answers for t.
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