Mathematics, 27.06.2020 03:01 memeE15

The fuel economy (in miles per gallon) of a certain car is E(x) = −0.01x2 + 0.64x +10.4, where x is the driving speed (in miles per hour, 20 ≤ x ≤ 60). At what speed is fuel economy greatest?

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The fuel economy (in miles per gallon) of a certain car is E(x) = −0.01x2 + 0.64x +10.4, where x is...

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