Uranium and radium are found in many rocky soilsthroughout the world. Both undergo radioactive decay, and oneof the products is radon-222, the heaviest noble gas (t1/2=3.82 days). Inhalation of this gas contributes to many lung can-cers. According to Environmental Protection Agency recom-mendations, the level of radioactivity from radon in homesshould not exceed 4.0 pCi/L of air.(a) What is the safe level of radon in Bq/L of air?(b) A home has a radon measurement of 41.5 pCi/L. The ownervents the basement in such a way that no more radon enters theliving area. What is the activity of the radon remaining in theroom air (in Bq/L) after 9.5 days?(c) How many more days does it take to reach the EPA recom-mended level?

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A: D option is incorrect

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Q: Please include steps

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