It is known that for all tests administered last year, the distribution of scores was approximately normal with mean 74 and standard deviation 7.1. a. a particular employer requires job candidates to score at least 80 on the dexterity test. approximately what percentage of the test scores during the past year exceeded 80?

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.