3.

Company produces very unusual CD's for which the variable cost is $ 9 per CD and the fixed costs are $ 30000. They will sell the CD's for $ 70 each. Let x be the number of CD's produced. Write the total cost C as a function of the number of CD's produced. C=$_______________.

Write the total revenue R as a function of the number of CD's produced. R=$ _____________________.

Write the total profit P as a function of the number of CD's produced. P=$____________________.

Find the number of CD's which must be produced to break even. The number of CD's which must be produced to break even is ______________.

4.

A baseball team plays in a stadium that holds 62000 spectators. With the ticket price at $11 the average attendance has been 27000. When the price dropped to $10, the average attendance rose to 31000. Find the demand function p(x), where xx is the number of the spectators. (Assume p(x) is linear.) p(x)=________________.