(Modeling) Solve the problem.
Cancer Risk from Radon Gas Exposure Radon gas occurs naturally in homes and is produces when uranium radioactively decays into lead. Exposure to radon gas is a known lung cancer risk. According to the Environmental Protection Agency (PA) the individual lifetime excess cancer risk R for radon exposure is between
1.5 × 10−3 and 6.0 × 10−3,
where R = .01 represents a 1% increase in risk of developing lung cancer (Source:Indoor-Air Assessment: A Review of Indoor Air Quality Risk Characterization Studies. Report No. EPA/600/8-90/044, Environmental Protection Agency, 1991.)
(a) Calculate the range of individual annual risk by dividing R by an average life expectancy of 72 yr.
(b) Approximate the range of new cases of lung cancer each year (to the nearest hundred) caused by radon if the population of the United States is 310 million.
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