Question

A rare bacterial culture is being grown in a lab. As time passes, the cells multiply in a specific pattern.

After 1 day, there is only 1 cell.

After 2 days, there are 5 cells.

After 3 days, there are 10 cells.

After 4 days, there are 16 cells.


How many cells will there be after seven days?


A. 40

B. 50

C. 60

D. 70

Answer 1

It appears that...

Second day: + 4
Third day: + 5
Fourth day: + 6

So it seems like you'd be adding in the next days, + 7, + 8 and so on to the number of cells.

Answer 2

I would say A. assuming the pattern stays the same
hope this helps