Mark wants to eat one last cookie from the cookie jar. In the jar there are 5 chocolate chip cookies, 6 peanut butter cookies, and 9 oatmeal cookies. He will randomly select one cookie from the jar. What is the probability that Mark will NOT pick a peanut butter cookie? (Enter fraction as a/b)

7.666270253x10 raised to the 18th power

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.