Posted by Renee on .
The quantity demanded each month of the Sicard wristwatch is related to the unit price given by the equation below, where p is measured in dollars and x is measured in units of a thousand. To yield a maximum revenue, how many watches must be sold? (Round your answer to the nearest whole number.)
P=41/0.01X^2+1 (0(less than or equal to)x(less than or equal to)20)
? watches

math 
Steve,
since P(x) is a decreasing function, maximum value is attained at the minimum x in the domain: 0.