A power company calculates a person's monthly bill from the number of kilowatt-hours (kWh), x, used. The function b(z) = { 0.15.2, x < 200 0.10 (x - 200) + 30, 2 > 200 determines the bill. How much is the bill for a person who uses 300 kWh in a month? A. $40
B. $45
C. $60
D. $55

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.