Unit 2 Review Exponential and Logarithmic Functions Review

• 1.1

• 2.6

• 3.5

• 5.1

A new phone costs $1,200 and depreciates by 15% per year. Which expression represents the approximate value of the car, in dollars, after t months?

The expression 50(1.07)^x can be used to calculate the amount of money in an account after x years. A year has 365 days. What is the best approximation of the daily interest rate?

• 0.019%

• 0.293%

• 1.85%

• 2.63%

• ln (8)

A coil spring is 18 cm long at rest. As shown in the diagram below, when compressed to a length of x cm, the spring will resist with a force that can be represented by the function f(x) = 5(18 - x). Which inverse function returns the length of the spring as a function of the force?

• -2

• -1

• 1

• 2