6 Answered Questions for the topic Half Life
Half Life Calculus 2
If 20% of the substance disappears in 10 years, what is its half-life? (Round your answer to two
A radioactive substance follows the decay equation dA/ dt= kA. If 20% of the substance disappears in 10 years, what is its half-life? (Round your answer to two decimal places.)
A fossilized leaf contains 13% of its normal amount of carbon 14. How old is the fossil (to the nearest year)? Use 5600 years as the half-life of carbon 14
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Half life algebra equation
The model for radioactive decay is y=y0e^−kt. A radioactive substance has a half-life of 820 years. If 70 grams are present today, in how many years will 28 grams be present? While solving this... more
Find the half-life. (Round your answer to the nearest whole number.)
A breeder reactor converts uranium-238 into an isotope of plutonium-239 at a rate proportional to the amount of uranium-238 present at any time. After 10 years, 0.03% of the radioactivity has... more
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A radioactive isotope, iron-52, used in the creation of medical images of bone marrow, has a half-life of 8.2 hours. If 8 microcuries are given to a patient, how many microcuries are left after 12... more
The half-life is 5600 years. If a piece shows only 79% left, when did the tree die?
Dealing with half life problems of carbon materials.