The value of a car goes down by 10% each year. a car costs £40000 new. how much is it worth after:
ai) 1 year
ii) 2 years
b) after how many years is it worth less than its original price?
does the answer to part b increase, decrease, or stay the same when
ci) the cost of the new car is changed to £12000
ii) the rate of decrease is changed to 20%

Saline iv fluid bags cost $64.20 for 24, 1000 ml bags from one supplier. a new supplier sells 500 ml bags for $2 each. the hospital uses about 10,000, 1000 ml bags each month. nurses report that about half of the bags are more than half full when they are discarded. if you are going to use only one supplier, which size bag provides the best deal, and how much will you save each month? compare the cost of the new supplier to the current one.