Acircle has an area of 75 square centimeters. which answer is closest to the measure of its radius?

The answer that is closest to the measure of its radius is

                       5 √(3/π) centimeters .

In fact, that one is exact ... can't get any closer.

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.