Skyler has twice as many apples in her grocery bag as her friends Macy and Janelle combined. Macy has 15 apple
in her bag. Skyler has 50 apples in her bag. How many
apples does Janelle have in her grocery bag?

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.

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Lucy spent $165 in december using a new credit card. in january, she began paying between $15 and $25 each month towards her account balance.