sailors once used a unit of length called a fathom to measure the depth of water. each fathom is equal to 6 feet.

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.

The principal, real, root of: 50−−√2=7.071067817.07106781−7.0710678150 is not a perfect square