Question 582171
The number of horsepower, H, needed to overcome a wind drag on an automobile is given by H=0.005s^2 + 0.007s - 0.031, where s is the speed of the car in miles per hour. At what speed will the car need to travel to use 200 horsepower to overcome the wind drag?
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H=0.005s^2 + 0.007s - 0.031
0.005s^2 + 0.007s - 0.031 = 200
5s^2 + 7s - 31 = 200000
5s^2 + 7s - 200031 = 0
*[invoke solve_quadratic_equation 5,7,-200031]
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Ignore the negative solution.
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I get the same answer.