Maddy and Tom have the same number of beads. Tom uses all his beads to make 8 bracelets. He uses 5 beads for each bracelet. Maddy makes 5 bracelets with all her beads. She uses an equal number of beads for each bracelet. Which equation shows how to find the number of beads Maddy uses for each bracelet?

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.