The domain of a function is all the values on the x-axis. The values on the x-axis are independent variables. The number of years lies on the x-axis and the dollar value of the scooter lies on the y-axis. Since the number of years start can only start from 0 and cannot be a negative number, choices 1 and 2 can be eliminated.

f(100) = 3500.\frac{1}{2}^{100} will result in a large number with a very high exponent.So,the number of years cannot be a maximum of 100 since the dollar value cannot be a large number with a very high exponent.

So, we are left with choice 4, When t = 10, f(10) = 3500.\frac{1}{2}^{10}

f(10) = \frac{3500}{1024} \approx 3.42 dollars.

Skills to recall:

What is the domain of a function

https://www.mathsisfun.com/definitions/domain-of-a-function.html

What is an exponential function

https://whatis.techtarget.com/definition/exponential-function

How to find 2^{100}

https://brainly.in/question/7051193