Automobiles start losing value, or depreciating, as soon as they leave the car dealership. Five years ago, a family purchased a new car that cost $16,490.

If the car lost 13% of its value each year, what is the value of the car now?

The number of trees in a rainforest decreases each month by 0.5%. The forest currently has 2.5 billion trees.

Write an expression to represent how many trees will be left in 10 years. Then, evaluate the expression.

From 2005 to 2015, a population of lions is modeled by the equation , where is the number of years since 2005.

1. About how many lions were there in 2005?
2. Describe what is happening to the population of lions over this decade.
3. About how many lions are there in 2015? Show your reasoning.