In repair shop a the repair bill for your car is $553. the parts cost $265, and the labor cost is $48 per hour. the parts at repair shop b are 10% less than repair shop a, but the cost of labor is two dollars more per hour.

Apublic library wants to place 4 magazines and 9 books on each display shelf. the expressions 4s +9s represents the total number of items that will be displayed on s shelves. simplify this expression

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?

Cody was 165cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.