The mean age of 12 women in an office is 35 years old. The mean age of 8 men in an office is 31 years old.
What is the mean age (nearest year) of all the people in the office?

Igot the answer of 15.8 years.

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.