In a collection of nickels, dimes, and quarters worth $6.90, the ratio of the numbers of nickels to dimes is 3: 8. the ratio of the number of dimes to quarters is 4: 5. find the number of each type of coin. (hint: make a coin value chart.)

Six nickels, sixteen dimes, twenty quarters.

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.