64, -48, 36, -27 which formula can be used to describe the sequence?
f(x + 1) = f(x)
o f(x + 1)=-3/4f(z)
o f(x) = 3/4f(x+1)
of) = -3/4f(x+1)

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.