Mr. Lin received a box of books in the shape of a rectangular prism. The volume of the box is 486 Inches cubed. What is the width of the box? A box has a length of 18 inches and a height of 3 inches.

Use the formula w = StartFraction V Over l h EndFraction, where l is the length of the prism, h is the height, V is the volume, and w is the width.
6 inches
9 inches
27 inches
81 inches​

Afactory makes propeller drive shafts for ships. a quality assurance engineer at the factory needs to estimate the true mean length of the shafts. she randomly selects four drive shafts made at the factory, measures their lengths, and finds their sample mean to be 1000 mm. the lengths are known to follow a normal distribution whose standard deviation is 2 mm. calculate a 95% confidence interval for the true mean length of the shafts. input your answers for the margin of error, lower bound, and upper bound.