P T This test: 25 point(s) possible @ This question: 1 point(s) possible . After the release of radioactive material into the at isotope (half-life 8 days). If it is safe to feed the ha mosphere from a nuclear power plant in a country in 1986, the hay in that country was contaminated by a radioactive y to cows when 14% of the radioactive isotope remains, how long did the farmers need to wait to use this hay? (an) The farmers needed to wait approximately i days for it to be safe to feed the hay to the cows. (Round to one decimal place as needed.)