When ingested, a radioactive isotope has an effective half-life of 5.15 hours. If the biological half-life of this isotope is 14.8 hours, how long would it take 3.601020 atoms of this isotope to decay so that only 5.201019 of these isotopes remain while outside of the body? Express your answer in hours to one decimal place, but When ingested, a radioactive isotope has an effective half-life of 5.15 hours. If the biological half-life of this isotope is 14.8 hours, how long would it take 3.601020 atoms of this isotope to decay so that only 5.201019 of these isotopes remain while outside of the body? Express your answer in hours to one decimal place, but