Lorena has two pieces of ribbons. one piece is 3 meter 14 centimeter long. the other piece is 8 meters 24 centimeters long. how many centimeters of ribbon does lorena have in all

Lorena has
3 meters=300 cm
1st piece=314 cm 
8 meters=800 cm
2nd piece=824 cm
together=824+314=1138 cm  or 11 meters and 38 cm
1m=100 cm

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.