question 1.

If fixed costs are RM25, variable cost per unit is RM2 and the demand function is

P = 20 - Q;

(a) obtain an expression for profit in terms of Q.

(b) Find the levels of output which give a profit of RM31.

(c) Find the maximum profit and the value of Q at which it is achieved.

question 2.

If the total revenue per month in ringgit, R(x) = 20x - 0.03x2 where x is the number of units

produced and sold per month, find

(a) the total revenue when 30 units are produced and sold,

(b) the average revenue function.