51% of the animals at an animal shelter are dogs. about what fraction of the animals at the shelter are dogs?

Give me the equations of two lines that have the same slope but are not parallel.

Identify the number as a rational or irrational. explain. 127

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.