The bacteria doubles every 10 mins.
If the initial number is x, after 10 mins it becomes 2x, after 20mins it becomes 4x...and after 60mins it is 2^6x
Here x = 10^4
hence final answer must be = 2^6 * 10^4.
Is the C the answer?
I had a quick question regarding the answer in the book.
Problem is as follows
A certain population of bacteria doubles every 10 minutes. If the number of the bacteria in the population was 10^4, what was the number in the population 1 hour later?
A. 2 (10^4)
B. 6 (10^4)
I chose D as the answer because I thought it would be 10^10? Where did I go wrong?
Choose 1 ring at a time,
The first one can go to any of the 4 fingers. So we have 4 ways for the first one.
The second one can go to any of the 4 fingers. So we have 4 ways for the second one.
and so on for all 5 rings.
By fundamental counting principle, we have 4*4*4*4*4 ways = 4^5 ways.
Hope this is lucid
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