Express the length of the ribbon in millimeters the ribbon is 9 centimeters long so turn that number in to millimeters I will mark you brainiest if you get correct

Idon’t know actually i’m in 5th grade and don’t know

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.