Am i doing this right? i'm really confused

Which function has the smallest y-intercept value

240 seventh graders and two-thirds of the students participate in after-school activities how many students participate in after-school activities

Assume that adults have iq scores that are normally distributed with a mean of mu equals 100 and a standard deviation sigma equals 20. find the probability that a randomly selected adult has an iq between 80 and 120.assume that adults have iq scores that are normally distributed with a mean of mu equals 100 and a standard deviation sigma equals 20. find the probability that a randomly selected adult has an iq between 80 and 120.