Algebra

posted by Kimberly

The fuel efficiency for a certain midsize car is given by
E(v) = −0.017v^ + 1.462v + 3.5 where E(v)is the fuel efficiency in miles per gallon for a car traveling v miles per hour.

(a) What speed will yield the maximum fuel efficiency? Round to the nearest mile per hour. _______mph

(b) What is the maximum fuel efficiency for this car? Round to the nearest mile per gallon. _______mpg

  1. Reiny

    You have a typo, there is no exponent on the first term

    anyway ...

    max when E ' (v) = 0

    E ' (v) = .....

    then set that equal to zero and solve for v

    for b) sub in your v from a) into the original equation

  2. Patty

    This is how the problem reads.

  3. Patty

    A = 43mph but I'm not sure how to solve B

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