3÷0.1=30
choose all of the statements that explain how the quotient relates to the dividend.
dividing 3 by 0.1 tells how many tenths are in 3 ones.
3÷0.1 is the same as 30÷1, which is 30.
it takes 10 tenths to make 1 whole, so it will take 3 times 10 tenths to make 3 wholes. 3×10=30.
the quotient has 110 of the value of the dividend so the dividend must be 10 times greater.
the 3 in 30 is 1 place to the right of the 3 in the whole number 3 which increases the value of the number 10 times.

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.