Vinny decorated 72 cookies and 36 minutes how many cookies did you decorate per minute

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

For what value of (y) is 3^3/3^y =1/9

Aculture started with 2,000 bacteria. after 8 hours, it grew to 2,400 bacteria. predict how many bacteria will be present after 19 hours . round your answer to the nearest whole number. p=ae^kt