Answer:
20.50 < 13 + .75n; 10 < n
Explanation:
First let us set up 2 equations to represent how much these payment methods are giving per hour:
f(n) = 20.50
g(n) = 13 + .75n
We want to find where f(n) < g(n):
20.50 < 13 + .75n → subtract 13
7.50 < .75n → divide by .75
10 < n
Thus, we would need to produce more than 10 units per hour to get the second option to be more profitable