Exponential Functions

The area covered by an invasive tropical plant triples every year. By what factor does the area covered by the plant increase every month?

The value of a truck decreases exponentially since its purchase. The truck was purchased for $34,000 in 1990 and losing 15% of its value every five years. Which expression could be used to determine the truck's value after 10 years have passed?

The value of a truck decreases exponentially since its purchase. The truck was purchased for $34,000 in 1990 and losing 15% of its value every five years. Which expression could be used to determine the truck's value after 1 year has passed?

The value of a truck decreases exponentially since its purchase. The truck was purchased for $34,000 in 1990 and losing 15% of its value every five years. By what factor does the truck lose value each year?

The half-life (Multiply by 1/2) of carbon-14 is about 5,730 years. A fossil had 6 grams of carbon-14 at one point in time. Which expression describes the amount of carbon-14, in grams, years after it was measured to be 6 grams?

• 8%

• .08%

• 100%

• 1.08%

You have purchased a new cell phone for $300. The value of the cell phone decreases by 40% every year. What percentage of its value does the cellphone lose each month?

• 2%

• 4%

• 40%

• 3%