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Is the square root of 4 plus the square root of 16 rational?

Suppose a store sells an average of 80 cases of soda per day. assume that each case contains 24 cans of soda and that the store is open 10 hours per day. find the average number of soda that the store sells per hour.

Erin bought christmas cards for $2 each to send to her family and friends. which variable is the dependent variable?