An animal sanctuary is constructing a large fish tank for its exotic fish collection. The tank will be a rectangular prism that is set into a large wall, and it will feature two, equally-sized hemispheres, one on each side of the tank. Visitors will be able to sit inside the tank with the fish. The polynomial (2x-30) represents the length of the new tank, the polynomial (2x-20) represents the width of the new tank, and the polynomial (2x-60) represents the height of the new tank.

Use the following information given to answer the questions.