55 c + 13 is less than or equal to 75 c + 39

Acollege is planning to construct a rectangular parking lot on land bordered on one side by a highway. the plan is to use 680 feet of fencing to fence off the other three sides. what dimensions should the lot have if the enclosed area is to be a maximum?

Asap will give brainliest and a lot of points

Use the knowledge of x- and y- intercepts to choose the correct graph of the equation 3x+6y=6