If 100 bacteria get into our body and reproduce every 20 minutes how many will there be in 2 hours?

2 hours =120 min

120/20=6
6x100=600

600

To calculate the number of bacteria in 2 hours, we need to figure out how many times they will reproduce in that time frame.

Since the bacteria reproduce every 20 minutes, we can calculate the number of 20-minute intervals in 2 hours by dividing 2 hours (120 minutes) by 20 minutes:

120 minutes / 20 minutes = 6 intervals

This means that within a 2-hour period, the bacteria will go through 6 reproductive cycles.

Now, let's calculate the total number of bacteria after 2 hours:

Starting with 100 bacteria, they will reproduce after the first 20 minutes, resulting in 2 bacteria (since 1 bacterium divides into 2).

After the second 20 minutes, each of the 2 bacteria will reproduce, giving us 4 bacteria.

After the third 20 minutes, each of the 4 bacteria will reproduce, resulting in 8 bacteria.

This pattern will continue for each 20-minute interval, so after the 6th interval, we will have:

2 * 2 * 2 * 2 * 2 * 2 = 64 bacteria.

Therefore, after 2 hours, there will be a total of 64 bacteria in our body.