What other areas of human or societal change have models that would fit an exponential curve?

Find the missing factor. write your answer inexponential form.9^2=9^4×

What is the equation of a line that passes through points (0, 4) and (-4,-8)?

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.