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The half-life of Cesium-137 is 30 years. Suppose we have a 140-mg sample.
The half-life of Cesium-137 is 30 years. Suppose we have a 140-mg sample.
i. What is the function that describes how much is left after t years? ii. How much of the sample remains (mg) after 8 years? iii.After how many years will only 10 mg remain? |
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I'll give you the answer to part 1, and then from that you can get the other 2. If you start with 'N' grams of material which has a half-life of 'H' years, then after 't' years the remaining is:
For part 3 you will have to use logarithm operations to solve for 't' given 'x'. |
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