Bismarck and Shannon get into an argument over whose grandma makes the BEST cookies!! They both ask their grandma's to make cookies for their math classes. Shannon's grandma can make 2 batches cookies per hour plus 4 extra batches cookies she made the other day. Bismarck's grandma can make 4 batches cookies per hour. How many hours will it take for their grandma's make the same amount of cookies?

15 point ! ~ see if you know the answer to both you!

How many different three-digit numbers can be formed using the digits 1 comma 2 comma 9 comma 6 comma 4 comma 3 comma and 8 without repetition? for example, 664 is not allowed.

Ascientist has discovered an organism that produces five offspring exactly one hour after its own birth, and then goes on to live for one week without producing any additional offspring. each replicated organism also replicates at the same rate. at hour one, there is one organism. at hour two, there are five more organisms. how many total organisms are there at hour seven? 2,801 19,531 19,607 97.655