At his trucking company, Paul received an order to ship 126 cubic feet of oil in cylindrical steel barrels. If each barrel has a radius of 1.2 feet and is 3 feet tall, how many steel barrels will Paul need?
A. 9
B. 10
C. 11
D. 8

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.

What is the value of the product (3-2i)(3+2i)?

Isaac wants the equation below to have no solution when the missing number is placed in the box. which number should he place in the box?