Sara and her sister leave home at the exact same time. Sara walks north at a rate of 4 miles per hour. Her sister walks east at a rate of 3 miles per hour. What is the straight line distance between the sisters two hours after they leave each other?> After two hours, the straight line distance between Sara and her sister is

An automobile assembly line operation has a scheduled mean completion time, μ, of 12 minutes. the standard deviation of completion times is 1.6 minutes. it is claimed that, under new management, the mean completion time has decreased. to test this claim, a random sample of 33 completion times under new management was taken. the sample had a mean of 11.2 minutes. assume that the population is normally distributed. can we support, at the 0.05 level of significance, the claim that the mean completion time has decreased under new management? assume that the standard deviation of completion times has not changed.

What is the value of m in the equation 1/2 m - 3/4n=16 when n=8

What is the slope of the line (-7,2) (4,6)