A box contains 20 balls bearing numbers 1, 2, 3, 4, . . . , 19, 20. A ball
is drawn at random from the box. The
probability that the number on the ball
is a two digit prime number is

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.

X= -5because this is a single step equation so you would just have to divide -16 both sides for x to equal your solution