The surface area of a rectangular prism is 2lw + 2lh + 2wh, where l is the length, w is the width, and h is the height. find the surface area of a prism whose length is 5 feet, width is 8 feet and height is 9 feet.

The distribution of a sample of the outside diameters of pvc pipes approximates a symmetrical, bell-shaped distribution. the arithmetic mean is 14.0 inches, and the standard deviation is 0.1 inches. about 68% of the outside diameters lie between what two amounts?