A colony of E. Coli in a lab doubles in number every 20 minutes through cell division. How many *HOURS* would it take for 1 cell of E. Coli to become 100 cells in a petri dish?

Aiden buys two bags of chips at $1.09 each and a 20 ounce soda for $1.20 at the gas station.he knows that the state tax is 5.5. how much change will he receive from a $5 bill?

The perimeter of a movie screen is 54 meters. the screen is 18 meters wide. how tall is it?

According to the 2008 u.s. census, california had a population of approximately 4 × 10^7 people and florida had a population of approximately 2 × 10^7 people. which of the following is true? a. the population of california was approximately two times the population of florida. b. the population of florida was approximately twenty times the population of california. c. the population of florida was approximately two times the population of california. d. the population of california was approximately twenty times the population of florida.