Answer:
The total of cells will the organism have after 6 minutes is 252
Step-by-step explanation:
* Lets consider this problem as a geometric series
- There is a constant ratio between each two consecutive numbers
Ex:
# 5  ,  10  ,  20  ,  40  ,  80  ,  ………………………. (×2)
# 5000  ,  1000  ,  200  ,  40  ,  …………………………(÷5)
* General term (nth term) of a Geometric series:
∵ U1 = a  ,  U2  = ar  ,  U3  = ar^2  ,  U4 = ar^3  ,  U5 = ar^4
∴ Un = ar^n-1
- Where r is the ratio between each two consecutive terms and
  n is the position of the number in the series
* The sum of first n terms of a Geometric Progression is calculate from
  Sn = a(1 - r^n)/1 - r  
- In the problem the cell split every minute
- The organism has 4 cells when the cells begin to split
∴ a = 4
# 4 , 8 , 16 , 32 , .......
∴ r = 2
- The total of cells will the organism have after 6 minutes can
   calculate from the rule of the sum
∴ S6 = 4(1 - 2^6)/1 - 2 = 4(1 - 64)/-1 = 4(-63)/-1 = 252 cells