36.A competitive firm has the short-run cost functionc(y)=2y3-16y2+128y+10. The firm will produce a positive amount in the short run if and only if the price is greater than

a.	$192.
b.	$48.
c.	$99.
d.	$96.
e.	$95.

37.Mr. DentCarr'stotal costs are 2s²+40s+40. If he repairs 10 cars, his average variable costs will be

a.	$60.
b.	$64.
c.	$80.
d.	$120.
e.	$40.

____39.Suppose that DentCarr'slong-run total cost of repairing s cars per week isc(s)=2s²+50. If the price he receives for repairing a car is $8, then in the long run, how many cars will he fix per week if hemaximizeprofits?

a.	2
b.	0
c.	4
d.	3
e.	6

____41.A firm has a long-run cost function,C(q)=9q²+9. In the long run, this firm will supply a positive amount of output, as long as the price is greater than

a.	$36.
b.	$44.
c.	$9.
d.	$18.
e.	$23.