SOLUTION: Find the break-even point for the firm whose cost function C and revenue function R are given. C(x)=0.3x+140; R(x)=0.5x a. P(680)=340 b. P(700)=350 c. P(690)=345

Question 1053360: Find the break-even point for the firm whose cost function C and revenue function R are given.
C(x)=0.3x+140; R(x)=0.5x
a. P(680)=340
b. P(700)=350
c. P(690)=345
d. P(720)=360
e. P(710)=355
Please break this down for me so I can understand. Thank you.
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
At breakeven, ,

The profit function is,

So at

By definition, at breakeven so
So for , you will make profit.
None of those answers is correct.
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