1. A real-state firm owns the Parklane Garden Apartments, which consists of 96 apartments. At $550 per month, every apartment can be rented. However, for each $25 per month increase, there will be three vacancies with no possibility of filling them. The firm wants to recieve $54,600 per month from rents. What rent should be charged for each apartment?
2. A health clinic has a solution of bleach to sterilize petri dishes in which culture are grown. The sterilization tank contains 100 gal of a solution of 2% ordinary household bleach mixed with pure distilled water. Now research indicated that concentration of bleach should be %5 for complete sterilisation. How much of the solution should be drain and replaced with bleach content to the recommended level?