SOLUTION: A truck traveling at a constant speed on a reasonably staight, level road burns fuel at the rate of g(X)gallons per mile, where x is the speed of the truck in miles per hour and g(

Question 254236: A truck traveling at a constant speed on a reasonably staight, level road burns fuel at the rate of g(X)gallons per mile, where x is the speed of the truck in miles per hour and g(X)is given by g(X)=(800+X^2)/200X.
a). if fuel costs $1.40per gallon, write the cost function, c(X),that express the cost of fuel for a 500 mile trip as a function of the speed. (Hint: 500 x g(x) gallons of fule are needed to go 500 miles) [ small x= symbole of multiplication and big X= alphabetical letter X.]
b). what driving speed will make the cost of fuel for the trip $250?
c). what driving speed will minimize the cost of fuel for the trip?
(thank you very much any help will be appriciated!!!! thanks again sir!!!)
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
Don't call us sir.
Not all of us are males.
Most males don't like being called sir except for military types.

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