The 50 cent Bluenose is one of Canada’s most famous postage stamps. In 1930 it could be bought at the post office for $0.50. In 2000, a stamp in excellent
condition was sold at an auction for $512. Determine the doubling time for the
stamp’s value.

If gravity is one third on mars then weight also one third on mars

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.