triangle abc is transformed to create triangle mno and triangle pqr as described below.
• mno represents the translation 2 units left and 2 units down of triangle abc.
• pqr represents the dilation of triangle abc by a scale factor of 2.
which of these is correct?

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.