Concept explainers
Reminder Round all answers to two decimal places unless otherwise indicated.
The Fukushima Disaster On March 11, 2011, Japan suffered an earthquake and tsunami that caused a disastrous accident at the Fukushima nuclear power plant. Among many other results, amounts of iodine-131 that were 27 times the government limit were found in a sample of spinach 60 miles away?' Now, 27 times the government limit of iodine-131 is 54 thousand becquerels per kilogram." The following table shows the amount I, in thousands of becquerels per kilogram, of iodine-131 that would remain after t days.
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a. Show that the data are exponential. (In this part and the next, round to three decimal places)
b. Find an exponential model that shows the amount of iodine-131 present after t days.
c. How long will it take for the amount of iodine-131 to fall to the government limit of 2 thousand becquerels per kilogram? Round your answer to the nearest whole day.
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Functions and Change: A Modeling Approach to College Algebra (MindTap Course List)
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