A tank can be filled by a pipe in 18 hours. Five hours after this pipe is opened, it is supplemented by asmaller pipe, which, by itself can fill the tank in 22 hours. Simultaneously, a drainpipe is opened, which, byitself, can completely empty the tank in 30 hours. Find the total time, measured from the opening of thelarger pipe, to completely fill the tank

B-simple yes/no questions

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.

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