A chemist mixed 5 mL of Solution A with every mL of Solution B to make a new solution with a new concentration. Which ratio of mL of Solution A to mL of Solution B will make a new solution with the same concentration?

A. 13:20
B. 6:4
C. 40:26
D. 25:8

11/36 is .305 repeating

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.