Answer:
(a) The profit function is P(x)=14x-224,000.
(b) The company's profit at x=21000 is 70,000.
Step-by-step explanation:
Cost function is
[tex]C(x)=224,000+32x[/tex]
Revenue function is
[tex]R(x)=46x[/tex]
where, x is number of radios.
(a)
Formula for profit:
Profit = Revenue - Cost
The profit function is
[tex]P(x)=R(x)-C(x)[/tex]
[tex]P(x)=46x-(224,000+32x)[/tex]
[tex]P(x)=46x-224,000-32x[/tex]
[tex]P(x)=14x-224,000[/tex]
The profit function is P(x)=14x-224,000.
(b)
Substitute x=21000 in the above equation to find the company's profit if 21,000 radios are produced and sold.
[tex]P(21000)=14(21000)-224,000[/tex]
[tex]P(21000)=294000-224,000[/tex]
[tex]P(21000)=70,000[/tex]
Therefore the company's profit at x=21000 is 70,000.