The Smith family purchased a new washer and dryer for $1400. They determined that the monthly cost to operate both would be $20. To determine the average monthly cost for owning and operating the washer and dryer over 2 months Mrs. Smith uses the function,
c(x)
(1400+20x). How many months before the average monthly cost is less than $40?
C
OF 73 months
G. 69 months
O
H. 70 months
O
J. 71 months