Adrian bought a concert ticket online for $41. He used a coupon code to get a 30% discount. The website also applied a 10% processing fee to the price after
the discount. How much did Adrian pay, in the end? Round to the nearest cent.

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.