Problem involving a Formula with gas and cars, help?

G

Gender Bender

New member
M=-1/30v^2+7/2v 0< v <60
M is miles a automobile can travel on one gallon of gasoline at a speed of v mi/hr

How would i Find the most economical speed for a trip?

and

how would i Find the largest value of M?

Could some one please set these up or show me how to do them?
 
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