Question

if you have a bacteria cell that you touch at 9:00 am (so now you have one cell on you) and it multiplies every 20 mins how much will i have on me at 4:00

Answer 1

That’s 7 hours

It doubles 3 times an hour

It doubles 21 times total starting with 1

At 4:00 you will have 1,048,576 bacteria cells.

Answer 2

Well, 9:00 AM to 4:00 PM would be 7 hours. 7 hours into minutes would be 420. 420 divided by 20 is 21. This means it multiplies 21 times from 9:00 to 4:00. Since it multiplies by 2, than you need to skip count with the pattern multiply by 2 and stop once you have 21 numbers.

1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192, 16384, 32768, 65536, 131072, 262144, 524288, 1048576. That would be 21 numbers.

The answer would be 1048576.

I think this is correct. :/