Which real-world situation can be represented by the expression 12n – 5?
a. sandy jogs 12 miles every week at a pace of 5 miles per hour.
b. last week, marcia earned $12.00 per hour plus an additional $5.00 in tips.
c. cameron had $5.00. then, he went to the school store and bought some pencils that cost $0.12 each.
d. a group of 12 students visit a museum and get a group discount of $5.00 off their total admission cost.