Distance Learning Week 7
Exponential Growth and Decay
Write the exponential growth equation using the formula y = a(1 + r)t
1. The original value of an investment is $1400, and the value increases by 9% each year. Write an exponential growth function to model the situation.
2. The cost of tuition at a college is $12,000 and is increasing at a rate of 6% each year. Write an exponential growth function to model the situation.
3. The number of student athletes at a local high school is 300 and is increasing at a rate of 8% per year. Write an exponential growth function to model the situation.
4. In 1985, there were 285 cell phone subscribes in Saginaw. The number of subscribes increased by 75% per year after 1985. Write an exponential growth function to model the situation.
5. The population of a small town is 1600 and is increasing at a rate of 3% per year. Write an exponential growth function to model the situation.
Write the exponential decay equation using the formula y = a(1 – r)t.
6. The value of a car is $18,000 and depreciating at a rate of 12% per year. Write an exponential decay function to model the situation.
7. A farmer buys a tractor for $50,000. If the tractor depreciates 10% per year, write an exponential decay function to model the situation.
8. The population of a town is decreasing at a rate of 1% per year. In 2000 there were 1300 people. Write an exponential decay function to model the situation.
9. An investment of $8200 loses value at a rate of 2% per year. Write an exponential decay function to model the situation.
10. The population in Haywardsville is decreasing at a rate of 2.5% per year. If the population in 2000 was 28,000, write an exponential decay function to model the situation.
PLEASE HELP DONT NEED AN EXPLANTION JUST ANSWERS