On saturday, mrs. armour bought 7 pairs of socks for $3 each, and a sweater for her dog for $12. then she found a $5 bill on the sidewalk. over the coarse of saturday, what was the change in the amount of money mrs. armour had?

Little’s law firm has just one lawyer. customers arrive randomly at an average rate of 6 per 8 hour workday. service times have a mean of 50 minutes and a standard deviation of 20 minutes. how long does a customer spend at little’s law firm on average?

Agreeting card company can produce a box of cards for $7.50. if the initial investment by the company was $50,000, how many boxes of cards must be produced before the average cost per box falls to $10.50?

If your teacher tells you to do questions 6 through 19 in your math book for homework, how many questions is that