A radio manufacturing firm has fixed cost of $25.000 cost and variable cost of $75.80 per radio. The radio sells for $119.95

Write an expression for the profit funciton and find the number of radios that must be sold to break even.

If money is invested at 9%, what is the effective anual rate if the investment is compounded

a) quarterly?

b) monthly?

c) daily?

d) countinesly?

A certain company has a fixed cost of $15.000 for its product and variable cost given by 140 + .04x dollars per unit, where x is the total number of units. The selling price of the product is 300-.06x dollars per unit. Form the profit function and find the break even point and level of sales which maximizes profits.