The gas mileage for a certain vehicle can be approximated by m = -0.04x^2 + 3.6x - 49, where x is the speed of the vehicle in mph. Determine the speed(s) at which the car gets 30 mpg. Round to the nearest mph.

Silvina2b 2022-08-07 Answered
The gas mileage for a certain vehicle can be approximated by m = -0.04x^2 + 3.6x - 49, where x is the speed of the vehicle in mph. Determine the speed(s) at which the car gets 30 mpg. Round to the nearest mph.
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Answers (1)

Ashlynn Stephens
Answered 2022-08-08 Author has 25 answers
m = -0.04 x^2 + 3.6 x - 49
30 = -0.04 x^2 + 3.6 x - 49
0.04 x^2 - 3.6 x + 79 = 0
x = 52 mi/hr (or) 38 mi/hr
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