
Mark M. answered 04/30/20
Mathematics Teacher - NCLB Highly Qualified
0.11 = (0.2)t/6
ln 0.11 = (t / 6)(ln 0.2)
Can you calculate t and answer?
Abbi S.
asked 04/30/20After the release of radioactive material into the atmosphere from a nuclear power plant in a country in
1999, the hay in that country was contaminated by a radioactive isotope (half-life 6 days). If it is safe to feed the hay to cows when 11% of the radioactive isotope remains, how long did the farmers need to wait to use this hay?
Mark M. answered 04/30/20
Mathematics Teacher - NCLB Highly Qualified
0.11 = (0.2)t/6
ln 0.11 = (t / 6)(ln 0.2)
Can you calculate t and answer?
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