Which statements are true? select each correct answer. a. 24g4+18g2=6g2(4g2+3g) b. 9g3+12=3(3g3+4) c. 4g2−g=g2(4−g) d.35g5− 5g2=5g2(7g3−5)

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $36.98. find the probability that a randomly selected bill will have an amount greater than $173, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?