Question

C(q) = q3−60q2+1200q+760 for 0 ≤ q ≤ 50 and a price per unit of $551.

Round your answers to the nearest whole number.
a) What production level maximizes profit?
q =

b) What is the total cost at this production level?
cost = $

c) What is the total revenue at this production level?
revenue = $

d) What is the total profit at this production level?
profit = $

Answer 1

did you check out the hints I gave on your previous post of this problem? If so, where do you get stuck?

The ticket problem is similar. How far do you get on that one?

Answer 2

Profit = Revenue - Cost
P = -q^3 + 60 q^2 +(-1200+551)q - 760

dp/dq = -3 q^2 +120q - 649
zero for max or min
q^2 - 40 q + 216.333... = 0

q = [ 40 +/-sqrt (1600-865)]/2
q = [40+/-27.1)/2
q = 34 or 6.5
to find out if max or min, take next derivative
d^2p/dq^2 = -6q +120
at q = 34
this is -84, so a maximum
at q = 6.5
this is +81 so a minimum
so for maximum profit we want q = 34
I think you can do the rest, check my arithmetic