The national demand and price for a certain type of energy-efficient exhaust fan are related by p=441-3/7q, where p is the price and q the demand. The price and supply of the exhaust fans are related by p=6/7q where p is the price and q is the supply of exhaust.
A. Find the price for a demand of 245,000 exhaust fans?
b. find the demand of exhaust fans at a price of $45
c. find the supply when the price is 546
d find the equilibrium quantity
e. find the equilibrium price