Which transformations could have taken place to
map δαβc to δα"b"c"?
a reflection and a dilation
a rotation and a dilation
a translation and a dilation
a reflection and a translation

What situation is an example of an observational study

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.

Find the distance between the point (-3,-4), and (see the picture below)