10.17.08. The focus of this collaboration is to use math to explore microbiology, and bacteria have proven a rich model organism. We started by showing students a video of E. coli bacteria undergoing exponential growth (the video was taken by Mr. Mugler at Caltech's Bootcamp). Students used exponents figure out, if one bacterium divides every 20 minutes, how many bacteria there will be after 8 hours.