Write the ratio 2/7 to 4 as a fraction in simplest form Plz answer this is my 3 time putting this question i really need help

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.

The product of sin 30 degrees and sin 60 degrees is same as the product of

The volume of a box varies directly with its length if a box in the group has a length of 30inches and k=24 what is its volume