How do you write 3 ones as a decimal

It takes a total of 6 hours to fill up an inground backyard pool using a standard house. a function can represent this situation to represent the amount of water in the pool until it is full a function of time the hose is running. determine the domain for the function

I’m stuck on this equation, anyone got the answer?

Which type of graph would allow us to quickly see how many students between 100 and 200 students were treated?