Answer:
12 years
Explanation:
Exponential Growing
Some variables tend to grow in time following an exponential function. The general equation for y as a function of t is

The case given in the question corresponds to the following function

We want to know the amount of time after which the function will be 10, or

Rearranging

Solving for t





When t=11 years, the employee is not paid at $10 per hour yet. We must jump to the next integer value.
