If sin x=1/3 find the value of sin3x

The table shows the distance traveled over time while traveling at a constant speed.

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

When y’all answer can y’all explain too !