1. Erika found out that after working in her current job for 9 months, she has earned 6 days of vacation.
a. If Erika works for 2 years, how many vacation days will she earn?

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?