Use the drawing tool(s) to form the correct answers on the provided number line. Gavin is designing a water tank in the shape of a rectangular prism. Based on the design, the tank's length should be 7 feet less than its height and its width should be 8 feet less than its height. Gavin wants the tank to hold a minimum of 840 cubic feet of water. Graph the solution to
the inequality that Gavin can use to find the possible heights he should consider for the tank.