Answer:

Explanation:
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In this case, since the dilution processes are characterized by the decrease of the original stock solution by holding the moles constant and therefore modify the volume, for the described dilution we can write:

Whereas we are asked to compute the volume of the original solution; thus, we can solve for it as shown below:

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Look up results of tests conducted by environmental agencies is the most logical answer in my opinion.
The force that accelerates objects towards Earth is gravity.
I believe doctors use (3) Co-60 to treat ILWs. Uranium and Carbon are not used, and a different isotope of lead is used to be attached to monoclonal antibodies.