Find the sine of both angle a and angle b.
a. sin a = 5/13; sin b = 12/13
b. sin a = 12/13; sin b = 5/13
c. sin a = 5/12; sin b = 12/5
d. sin a = 13/5; sin b = 13/12

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?