Explain how to compare two lengths that are measured in different sized units

What is the standard form of -5x^2+2x^4-11+x^3+3x

Can someone answer this question for me

Tim knows the volume and base area of a wooden chest that is in the shape of a rectangular prism. if the volume is 524 cubic unit and the base area is 15 square unit, what is the height of the chest? 124 unit 1124 units 112 unit 1112 units