A farmer has 1000 kg of fertilizer that is 15% nitrogen and 1300 kg of a fertilizer that is 83% nitrogen. How much 83% should he use to get 800 kg of a fertilizer that is 35% nitrogen?

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?

Diane owes $387 to her brother. if she debits her bank account $161.25 a month to pay him back, how many months will it take her to pay off the debt?

Acircular garden with radius of 8 feet is surrounded by a circular path with a width of 3 feet. what is the approximate area of the path alone? use 3.14 for π