Question

QuestioN
57–61 Find a formula for the described function and state its domain.
57. A rectangle has perimeter 20 m. Express the area of the rectangle as a function of the length of one of its sides.
58. A rectangle has area 16 m2. Express the perimeter of the rectangle as a function of the length of one of its sides.
59. Express the area of an equilateral triangle as a function of the length of a side.
60. Express the surface area of a cube as a function of its volume.

61. An open rectangular box with volume 2 m3 has a square base. Express the surface area of the box as a function of the length of a side of the base.