The ages of participants in a bond pile are normally distributed, with a standard deviation of 10 years. 34% are 40-50 years old and 13.5% are 20 and 30 years old. If there were 160 participants in the bonspiel, how many were between the ages of 20 and 60??

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $32.09. find the probability that a randomly selected bill will have an amount greater than $155, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?

Measure of angles 31 (x+4) (3x+9) me

Which is the correct first step in finding the area of the base of a cylinder with a volume of 26x cubic meters and a height of 6.5 meters? v=bh 6.5=b(26x) v=bh v=26pi+(6.5) v=bh v=26pi(6.5) v=bh 26pi=b(6.5)