Daisy received 10,000 on her 18th birthday and decided to invest it. The rate of growth on this investment is 12 per cent per year. Daisy wants to use this money for a downpayment on her condo when she graduates from university in 4 years. How much will Daisy have for her downpayment?

Mark wants to buy his car cash for 12,000. How long will it take him to accumulate this amount if he invests 900 at 7.5% compounded per year.?

B. If Jenny invests 300 at the same compounded annual rate. How long will it take her to purchase the same car?

How much louder is an mp3 player (120dB) when compared to a crying baby (75dB)?