Find the number in each case. illustrate each answer with a number line. a) 25% of a number is 5. b) 75% of a number is 18. c) 4% of a number is 32. d) 120% of a number is 48

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.