During the 1860s, the pony express delivered mail between San Francisco, California and Denver, Colorado. The riders where able to cover about 245 miles per day before they would stop and rest. The trip between San Francisco and Denver takes 2.6 days.
Using this information, how many miles is it between San Francisco and Denver?

A)
94 miles

B)
595 miles

C)
632 miles

D)
637 miles
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Tim's phone service charges $26.39 plus an additional $0.21 for each text message sent per month. if tim's phone bill was $31.64, which equation could be used to find how many text messages, x, tim sent last month?

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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