Compare the investment below to an investment of the same principal at the same rate compounded annually. ​principal: ​$​1000, annual​ interest:4 ​%, interest​ periods: 2 ​, number of​ years: 19 After 19 ​years, the investment compounded periodically will be worth ​$ (answer) nothing more than the investment compounded annually.

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.