John had $50 to spend at the mall. He purchased a shirt for $17.50, a pair of pants for $24.99, and a belt for $6.99. John used a coupon that took $5.00 off his purchase. The total sales tax was $3.06. How much money does John have left after his purchases?

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.