The dinggnat doorknob company intends to sell a new line of square doorknobs. the price-demand function is p ( x ) = 48.5 − 0.09 x p ( x ) = 48.5 - 0.09 x . that is, p ( x ) p ( x ) is the price in dollars at which x x knobs can be sold.

a. how many knobs can be sold at a price of $36.30?

b. write an equation for the revenue function r(x).

a. 135 doorknobs

b.

Step-by-step explanation:

The price-demand function is:

a. At a price of $36.30, the number of doorknobs sold, 'x' is:

Rounding it down to the nearest whole unit, the company can sell 135 doorknobs at $36.30

b. Revenue is the product of the price, p(x), by the demand, x. Therefore, the Revenue function is:

5x+2x=49

7x=49

x=7. 35 apples