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?

Percent increase and decrease. original number: 45 new number: 18

My hour hand points between the 8 and the 9 in 35 minutes it will be the next hour. what time is it ?

Maren is buying carpet for her rectangular living room. the room is 4.8 yards wide and 5.2 yards long. how much carpet does she need to buy? enter your answer as a decimal in the box. yd2