Compare the values. 4x 107 is
?
times as much as 4 x 103.
10^4
4 x 10^10
10^10
4 x 10^4

The answer is the first one! 10^4

4should be the last one n=4

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.