Suppose that a phone that originally sold for $800 loses 3/5 of its value each year after it is released. After 2 years, how much is the phone worth?

Write an equation for the value of the phone, , years after it is released.

Do some research and find a city that has experienced population growth. determine its population on january 1st of a certain year. write an exponential function to represent the city’s population, y, based on the number of years that pass, x after a period of exponential growth. describe the variables and numbers that you used in your equation.

Find the quotient with the restriction.

At the beginning of year 1, carlos invests $600 at an annual compound interest rate of 4%. he makes no deposits to or withdrawals from the account. which explicit formula can be used to find the account's balance at the beginning of year 5? what is, the balance?