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H=45t-4.9t^2 what's the max height?

H=45t-4.9t^2 what's the max height?
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H=45t-4.9t^2 what's the max height?

User David Pratte
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Differentiate to find time that gradient=0 45-9.8t=0 45=9.8t t =4.59 secs put this value into original equation to get 103.31
User Amir Karimi
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