Fiona starts at the beginning of a hiking trail and walks 4/5 mile. she counts the mileage markers that are placed every 1/10 mile along the trail. how many markers does she count?

She counts 8 markers because 4/5 equals 8/10 and she counts the mile markers every 1/10 of a mile.

In this problem it decreased 20%

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.