It cost $68.00 for 16 square feet of flooring. how much does it cost for 12 feet of flooring

Which of the greatest common gcf of 32 and 48 a 16 b 96 c 8 d 32

If square root x = -7, then x= -49 true or false

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.