8. Hilda rented a canoe. The rental rate is $20 flat fee and $12.50 per hour. She was charge a total of $45. Which equation could be used to find h, the number of hours she rented canoe?

Out of the 150 students at a summer camp, 72 signed up for canoeing. there were 23 students who signed up for trekking, and 13 of those students also signed up for canoeing. use a two-way table to organize the information and answer the following question: approximately what percentage of students signed up for neither canoeing nor trekking?