The circle at the right represents a planet. The radius of the planet is about 4700km. Find the distance d to the horizon that a person can see on a clear day from the following height h above the planet. equals
5 km

The first option would be correct if it were one half and not one

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.