Megan earned $105.00 for 12h of mowing lawns. Jordan earned $126.75 for 15h of packing groceries. Who had the higher rate of pay and by how much?

The sales totals at macy's food store have increased exponentially over the months. which of these best shows the sales in the first three months?

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.

Find two numbers if their sum is 91 and the ratio is 6: 7?