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defon
3 years ago
15

A culture started with 1,000 bacteria. After 2 hours, it grew to 1,100 bacteria. Predict how many bacteria will be present after

9 hours.
Mathematics
2 answers:
Agata [3.3K]3 years ago
7 0

Answer:

450

Step-by-step explanation:

Harrizon [31]3 years ago
6 0

Answer:

450 Bacteria

Step-by-step explanation:

First we need to consider the amount of bacteria that grew after two hours. Since 100 bacteria grew after 2 hours, we need to find how much bacteria grows per hour.

We can find that by dividing 100 by 2

100/2 = 50 Bacteria per hour

Now that we know how much bacteria grows per hour, we can then multiply that amount to the amount of hours asked in the problem.

9 hours x 50 Bacteria = 450 Bacteria in 9 hours.

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3 years ago
A sodium Isotope has a half life of 15 hours how much sodium is left after 100 hours
JulsSmile [24]
We'll say beginning amount is 100
Ending Amount = Beginning Amount / 2^n  where n is the number of half-lives
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Ending Amount = 100/2^(6.666666)
Ending Amount = 100 / <span> <span> <span> 101.59
</span></span></span>Ending Amount = <span> <span> <span> 0.9843488532 </span> </span> </span>
So if we started with 100 grams after 100 hours (or 6.6666666 half-lives) we would only have <span> <span> 0.9843488532 </span> grams remaining.
http://www.1728.org/halflife.htm

</span>
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Nezavi [6.7K]
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Answer:

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Step-by-step explanation:

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The "solution set" is thus all real numbers to the left of 2 OR to the right of 3.

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