Astore had 175 cell phones in the month of january. every month, 10% of the cell phones were sold and 10 new cell were stocked in the store. which recursive function best represents the number of cell phones in th store f (n) after n months?

F=(175*.10+10n) the star is a times sign

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.

Equatorial triangle and obtuce angle