Exponential growth and decay Quiz

In 2010 a new Toyota Camry was valued at $20,000.
It depreciates at a rate of 12% a year.
What is this Toyota Camry's value in 2021?
Round final answer to the nearest whole number.

$

A house appreciates in value at a rate of 10% per year.
The house is worth $600,000 now.
How much will its value be 12 years from now?
Round final answer to the nearest whole number.

$

You purchased your phone 3 years ago for $560.
It depreciates at a rate of 25% per year.
How much would you potentially be able to sell it for now?

$

A patient has been given a drug. The concentration of the drug in the bloodstream decreases by 20% each hour.

Population of Louisville was 20,000 people in 2003.
The population has been increasing at a rate of 2% per year for 9 years.
What was the population of Louisville in 2012?
Round to the nearest whole number (round down for people)

people