C. because the 2nd number is 5 or up. Which makes it round up
3*5=15
15-4=11
therefore 11 is your answer
Answer:

Step-by-step explanation:

Answer:
$1.5
Step-by-step explanation:
$7- 5.50= 1.5
Teacher c makes the most money at the end of their career since the model is entirely linear.