10 points. Which would be the best deal and the worst deal on candy (and please answer the question they ask in the picture I attached).

If 1 km = 0.621 miles, how many miles are in a centimeter

James was playing a game with his friends. he won 35 points. then he lost 15, lost 40 and won 55. how did he come out

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.