Use the model to write the equation that represents the problem.

I have four and one-half squares and I want to divide them by one-third. How many pieces would I have?
A) 4
1
2
÷
1
3
= 15
Eliminate
B) 4
1
2
÷
1
3
= 13
1
2
C) 4
1
2
÷
1
3
= 13
D) 4
1
2
÷
1
3
= 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?