What is the range of the first graph & the domain of the second graph ?

You are updating your garage and the only thing left to paint is your garage day. you're only going to paint the slide that faces the street. the garage door is 9 fert 8inches tall and 120 inches wide. you need to know the surface area of the side of the garage door to determine how much paint to buy. the hardware store sells paint by how much covers a square foot. what is the surface area you should report to the hardware store what is the answer

The graph represents the gallons of water in a water tank with respect to the number of hours since it was completely filled

In which form is the following function written? y = - 2(x – 3)(x + 5)