Alex’s gasoline consumption, g, varies inversely with the price of a gallon, p. Alex uses 22 gallons of gas per week when the price is $3.49 per gallon. How many gallons will he use if the price goes up to $3.89 per gallon? Round to the nearest gallon.

A. 14

B. 16

C. 18

D. 20

Question

Alex’s gasoline consumption, g, varies inversely with the price of a gallon, p. Alex uses 22 gallons of gas per week when the price is $3.49 per gallon. How many gallons will he use if the price goes up to $3.89 per gallon? Round to the nearest gallon. 

A.  14 

B. 16

C.  18 


D.  20

anonymous · Answer

anyone. -_-?

anonymous · Answer

22gallons *3.49 $/gallon = X gallons*3.89 $/gallon

(as the price goes up, his usage goes down...)

X = 22*3.49/3.89 = 19.74 gallons which rounded would be 20