"if i didn't have class tonight, i would save the $4 campus parking fee and spend four hours at work where i earn $10 per hour." the opportunity cost of attending class this evening is:
a. $0
b. $4
c. $40
d. $44

Opportunity cost will be $44

So option (d) will be the correct option

Explanation:

We have given that if he is not going to class then he save $4 of campus parking fee

And he work for 4 hours at rate of $10 per hour

So his total earning will be = 4×$10 = $40

Now we have to find the opportunity cost

Opportunity cost will be given by

Opportunity cost = Earning +saving = $40+$4 = $44

So option (d) will be the correct answer  

exaclty 30 degrees celcius is the answer

answer; break-even analysis;