Kelly invested $1,500 in the stock market on january 1. she lost 1/3 of it by the end of january and 2/5 of the remaining amount by the end of february. how much did she have left?

Kelly invested $1,500 in the stock market on January 1 She lost 1/3 of it by the end of January or that is: (1/3)*1500 = $500 the remaining amount is 1500 - 500 = $1,000 she lost 2/5 of the remaining amount by the end of February: (2/5)1000 = $400 what is left is: 1000 - 400 = $600.

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.