Each lap around steven's block is seven eighths of a mile. if steven ran six
laps last week, and five and a half laps this week, how many miles has he
run? (round to two decimal digits)

If y varies directly as x2 and y=6 when x=6, find the constant of variation.

Which expression do you get when you eliminate the negative exponents of 4a^2 b^216a^-3 b

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.