A 9-meter by 11-meter rectangular garden has a one-meter wide walking path all around it (outside the garden). What is the area of the walking path?

45 sq meters

Width - 9 meters
Width with path - 11 meters ( 1 meter each side)

Length - 11 meters
Length with path - 13 meter

Area without path - 9 * 11 = 99
Area with path - 13 * 11 = 144

Subtract area without from area with

144 - 99 = 45 sq meters

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.