Which of the following is the equation of the line that passes through (2,1) and is parallel to: 5x+y=9?

Find the sum of the following series. round to the nearest hundredth if necessary.

If a baby uses 15 diapers in 2 days, how many diapers will the baby use in a year?

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.