Anna baked 3 33 batches of cookies with c cc cookies in each batch. She then ate 8 88 cookies!

Determine whether the set of whole numbers is closed under addition. explain why the set is or is not closed. give an example.

The cost of using a service is $0.25 per min. what equation correctly represents the total cost c, in dollars, for d days of use?

Suppose that prices of a gallon of milk at various stores in one town have a mean of $3.71 with a standard deviation of $0.10. using chebyshev's theorem, what is the minimum percentage of stores that sell a gallon of milk for between $3.41 and $4.01? round your answer to one decimal place.