MC = 43 + 4q, so What is additional cost incurred by increasing output from 3 to 5?

Question

MC = 43 + 4q

 What is additional cost incurred by increasing output from 3 to 5?

Answer 1

I assume that by MC you mean "manufacturing cost."

However, since you have written mathematical expression for it, the symbol ought not to be two consecutive letters because that has the appearance of meaning "M times C.:

 

Call it C(q).. Evaluate C(5) - C(3) to answer your question.