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The number of people who attend Mr. Gouline’s healthy SnackChat © sessions increases increases by 4.5% each month. If 10,000 people currently attend, how many people will come in ten months? After how long will there be 20,000 attendees? The value of a motorcycle decreases by 9% each year. If the motorcycle is worth $13,000 now, how much will it be worth in 4 years? The value of Mr. Gouline’s car is cut in half every three years. If the value is $18,000 now, how much will it be worth in seven years? The value of Mr. Dawson’s car is cut in half every four years. If his car is currently worth $12,000, after how long will it be worth $9,000? A single bacteria is left on the kitchen counter. If the number of bacteria doubles every four hours, after how long will there be 1,000,000 bacteria on the counter? The half-life of Carbon-14 is 5,730 years. If a sample that originally had 22 grams of carbon now has seven grams of carbon, approximately how old is the sample? Mr. Gouline is a shrewd investor, and the value of his investments doubles every seven years. If he has $1,000 now, how long will it take for him to have $15,000, assuming he makes no additional investment? The half-life of radium is seven days. Mike hopes to pick up a 75 pound block of radium, but it is too heavy. If he waits until the radium is 60 pounds, how long will he have to wait? Bank of America gives 1.75% interest, compounded monthly. How much will a $50 investment be worth after two years? PNC bank offers 2.15% interest, compounded weekly. If Tommy needs $1,000 in 5 years, how much money does he need to invest? Douglas wants to buy a new butterfly net which costs $125. If he invests $42 at 6% interest, compounded monthly, how long will it take him to save enough? Bank of Warcraft (BoW) gives 8% interest, compounded daily. If Ben invests 72 WoW dollars, after how long will his investment have grown to 100 WoW dollars? Mr. Burns, a wealthy and extravagant man, offers you one of two choices. First, he will give you $100,000 every day for 30 days. Second, he will give you a penny on the first day. Each day, Mr. Burns will give you the amount of money that you have, thus doubling your money. Which deal will leave you with the most money at the end of 30 days?