Ok guys I seriously need help with this pleas ＞︿＜ Given the following exponential function, identify whether the change represents growth or decay, and determine the percentage rate of increase or decrease.

y=52(0.42)^x
please please please help me :(

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.