Janine has two important tests to study for. if she plans to divide her study time equally between both tests, how long should she spend studying for each test if she wants to study for at most 90 minutes?

90/2 = 45
45 minutes each.

90 mins divide by 2 tests = 45 mins per test

Period is the time it takes for one “cycle” to complete. in the parent sine function, period is 2*pi since sin(0) = 0, sin(pi/2) = 1, sin(pi) = 0, sin(3pi/2) = -1, and sin(2pi) = 0. at that point, the sequence repeats itself. i’m not sure if your graph is similar to the sine function since you didn’t provide a picture, but you can find the period by looking at a graph.