Answer:
<em><u>Coal. Reserves, production, prices, employment and productivity, distribution, stocks, imports and exports.
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<em><u>Renewable & Alternative Fuels. Includes hydropower, solar, wind, geothermal, biomass and ethanol.
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<em><u>Nuclear & Uranium. ...
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<em><u>Total Energy.</u></em>
Explanation:
Answer:
I kinda forgot but let me think
Hey there!
A half-life means after a certain amount of time, half of that substance will have decayed after that time.
An equation for exponential decay is the following:
y = a(1 - b)ⁿ
Where a is the original amount, b is the rate of decay, and n is time.
1000 is about 0.3 of a half life, 1000 divided by 138 days (3312 hours) is approximately 0.3.
Let's plug in values to that equation:
y = 321(1 - 0.5)^(0.3)
Simplify.
y = 260.73
There will be 260.73mg of polonium-210 remaining after 1000 hours.
Hope this helps!