Six years ago, 12.6% of registered births were to teenage mothers. a sociologist believes that the percentage has decreased since then.

1. 5/82.95% is better than 7/8

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.

Add the cents that add the left overs to get the first number