Question

A cell phone company estimates that a cell phone loses about 15% of its value each year after it is purchased. The function f(x)=900(0.85)^x represents the estimated value (in dollars) of a cell phone 5 years after its purchase. What is the domain and range?? PLEASE HURRY THIS IS DUE IN AN HOUR

Answer 1

The domain of the function f(x) = 900(0.85)^x is the set of real numbers, since the value of x (the number of years after purchase) can be any real number.

The range of the function is non-negative real numbers and less than 900, since the value of the function (the estimated value of the cell phone in dollars) will always be non-negative and less than the original price of 900 dollars, since it is losing value every year.

Explanation: