A bacteria divides every half-hour to produce two new bacteria. If 30 bacteria start in a petri dish, how many will be present at the beginning of the 5th hour?
This is a squencing problem that I am unsure of how to work... I have formulas but I'm not sure which one it fits with and they are as follows:
s=a1 (1-r^n)/(1-r)
an=a1 (r^n-1)