Jack is preparing for a party and makes potato salad, but he does not realize that the salad contains one escherichia coli bacterium. he accidentally leaves the salad out of the refrigerator for 2 hours. if
e. coli can double its population every 20 minutes, how many bacteria would be present in the salad after 2 hours?

Simon, aged 10, is invited to a classmate's birthday party at an exclusive ski resort on march 15th. the day will include 4 hours of snowboarding, lunch and birthday cake. simon's mother checks a box on the invitation that says "yes, we will attend" and returns it to the classmate's address. unfortunately, they later don't attend the party when simon comes down with the flu. on march 17th, simon's mother receives an invoice in the mail from simon's classmate for $35 that says, "party no-show fee." can simon's classmate collect the fee?