Polynomials math question

Aportion of a line bounded by two points is defined as

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

Find and simplify an expression for the area of five rows of x squares with side lengths of x centimeters.