Giving brainliest please help with math

It’s 15 because the ratio of the ones that are running for a cause is 120:800 and they wanna know the ratio of who is running for the cause out of 100 so it would be ?:100 but to find the answer you would divide 120 by 8 since 800 divided by 8 is 100 which would give you the answer of 15 participants participating for the cause

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.