Gina is buying juice for a class breakfast at school. at the discount store, she can purchase 30 individual juice boxes for $21.99. at the grocery, she can buy 1\2 gallon cartons of juice. each cat on is $3.99 and contains 5 servings. which is the better buy?

Ageologist had two rocks on a scale that weighed 4.6 kilograms together. rock a was 0.5 of the total weight. how much did rock a weigh?

At $1.32 million, they closed last month percent above what they paid in 2007." how much did they pay in 2007?

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.