If the price in dollars of a stereo system is given by q 64
     If the price in dollars of a stereo system is given by (q) = 6400/q^2 + 1000, where q represents the demand for the product, find the marginal revenue when the demand is 20.  What is the formula for the revenue function?  R(q) = pq  R(1) = p\'q  R(q) = p/q  R(q) = p\'p  The marginal revenue for the given demand is $   
  
  Solution
p(q) = 6400/q^2 + 1000 -----> price
q ---> demand
So, Revenue, R(q) =p*q ; Option A
R(q) = q(6400/q^2 +1000) = 6400/q + 1000q

