PLEASE HELP I DONT KNOW AH THE PICTURE HERE HELP

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

Evaluate the expression for the given value of the variable. 5×(h+3) for h=7

How many solutions does the nonlinear system of equations graphed bellow have?