Discuss the below:
Q: The quantity q, of a certain skateboard sold depends on the selling price, p, in dollars, so, we write q = f(p). You are given that f(140) =15,000 and f' (140) = -100.
a) Total revenue, R, earned by the sales of skateboards is given by R = pq. Find
b) What is the sign of dR/dP|p-140
If skateboards are currently selling for $140 what happens to the revenue if the price is increases to $141?