bacteria are tiny organisms that consist of a single cell. New bacteria are created when a cell splits into two identical copies.
A scientist keeps track of bacteria cells. She starts with 1 cell. After one hour, there are 2 cells. The number of cells continues to double in each of the following hours.
complete the table to show the total number of cells after 2 hours
hour | expression | number of cells |
1 | 2 | 2 |
2 | 2 x 2 | ? |
hour | expression | number of cells |
1 | 2 | 2 |
2 | 2 x 2 | 4 |
hour | expression | number of cells |
1 | 2 | 2 |
2 | 2 x 2 | 4 |
3 | ? | ?|
complete the table to show the total number of cells after 3 hours
hour | expression | number of cells |
1 | 2 | 2 |
2 | 2 x 2 | 4 |
3 | 2 x 2 x 2 | 8 |
hour | expression | number of cells |
1 | 2 | 2 |
2 | 2 x 2 | 4 |
3 | 2 x 2 x 2 | 8 |
4 | ? | ?|
complete the table to show the total number of cells after 4 hours.
hour | expression | number of cells |
1 | 2 | 2 |
2 | 2 x 2 | 4 |
3 | 2 x 2 x 2 | 8 |
4 | 2 x 2 x 2 x 2 | 16 |
complete the statements:
the number of cells increases by a factor of ?
The number of cells increases by a factor of 2.
after 4 hours, the number 2 is used as a factor ? times
complete the statement