The volume of a fish tank is 70 cubic feet. if the density is 0.4 fish over feet cubed, how many fish are in the tank?

There would be 28 fish.
The given information tells us that there is .4 fish per ever cubic foot, and there are 70 cubic feet, so multiply 70 by .4 to get the amount of fish. The answer is 28.

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.