At the beginning of the year, the number of books owned by a library was 10,000. Since then, it has grown by 1% each month. Which expressions represent the number of books, in thousands, owned by the library 5 years later if it continues to grow at that rate?

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.