The height in meters, S, Of a rocket T seconds after being launched within a word velocity of 80 m/s maybe approximated by the equation s = 80t - 5t^2. how many seconds after launching does the rocket reach 140 m above the ground?

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04-10-2022
Mathematics

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The height in meters, S, Of a rocket T seconds after being launched within a word velocity of 80 m/s maybe approximated by the equation s = 80t - 5t^2. how many seconds after launching does the rocket reach 140 m above the ground?

Sagot :

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