Draw a sketch to you solve this problem. express your answer in simplest form.

tom ate of the loaf of bread in the morning and of the loaf of bread in the afternoon.

how much of the bread did tom eat?

a.1/6

b.2/3

c.1/3

d.1/2

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.