1) The bank account started with $100, and increases at a rate of 4%. Write a function to represent the situation. a) f(x) = 100(1.04)x b) f(x) = 4(100)x c) f(x) = 400(0.71)x d) f(x) = 2100(0.5)x e) f(x) = 100(0.96)x 2) The bank account started with $100, and increases exponentially with a growth rate of 4%. Write a function to represent the situation. a) f(x) = 100(1.04)x b) f(x) = 100(e) 0.04x  c) f(x) = 100(e)x d) f(x) = 2100(0.5)x e) f(x) = 100(0.96)x 3) A piece of land was purchased for $30,000 in 1960. The value of the land increased by 5% each year. Write a function to represent the situation.  a) f(x) = 100(1.04)x b) f(x) = 30,000(1.05)x c) f(x) = 30,000(0.95)x d) f(x) = 5(30,000)x e) f(x) = 120(0.88)x 4) An adult takes 400mg of ibuprofen. Each hour, the amount of ibuprofen in the person's system decreases by 29%. Write a function to represent the given situation.  a) f(x) = 29(400)x b) f(x) = 400(1.29)x c) f(x) = 400(0.71)x d) f(x) = 2100(0.5)x e) f(x) = 120(0.88)x 5) You buy a new computer for $2100. The computer's value decreases by half annually. Write a function to represent the given situation.  a) f(x) = 100(0.5)x b) f(x) = 2100(1.5)x c) f(x) = 50(2100)x d) f(x) = 2100(0.5)x e) f(x) = 120(0.88)x 6) You drink a coffee with 120mg of caffeine. Each hour, the caffeine in your system decreases by 12%. Write a function to represent the given situation.  a) f(x) = 100(1.04)x b) f(x) = 120(1.12)x c) f(x) = 12(120)x d) f(x) = 2100(0.5)x e) f(x) = 120(0.88)x 7) The half-life of Warfbrennian is 185 days. How long will it take to have only 15% left? a) 27.75 days b) 506.34 days c) 214.94 days d) 170 days e) 404.81 days 8) The half-life of Warfbrenian is 185 days. If you have a sample of 150 pounds of Warfbrenian, how much will be remaining after 35 days? a) 141.7 pounds b) 125 pounds c) 131.6 pounds d) 157.4 pounds e) 35 pounds

Exponential Growth & Decay Warm-Up

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