The number of employees working for Cogsworth Cogs in 1999 was 11,851, with an expected decrease of 2.2 per year. At the percent of decrease given, what was the expected number of employees working at Cogsworth Cogs in 2000? Round your answer to the nearest whole number. Use P/100=A/B Please help

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.