PLEASE ANSWER What is the vertex of this quadratic function?
A)
(-4,0)
B)
(-2,0)
C)
(-3, 1)
D)
(0, -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.