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Twenty percent of a radioactive

Twenty percent of a radioactive substance decays in ten years. By what percent does the substance decay each year?
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2. asked by katrina
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My basketball coach says I am a solid point guard because my assists have gone up twenty percent since last year.Which word or
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2. asked by Ice bear
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16. What percentage of the American population is made up of immigrants in the modern day?(1 point)* A. less than five percent
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The graph below shows the radioactive decay of rubidium-87.What percentage of rubidium-87 atoms will be left after three
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The percent P of a radioactive substance remaining after time t weeks is given by the formula p = 100.(0.5)^1/20 the percent to
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2. asked by Help
3. 438 views
An unknown radioactive element decays into non-radioactive substances. In 420 days the radioactivity of a sample decreases by 39
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2. asked by Kim
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An unknown radioactive element decays into non-radioactive substances. In 120 days the radioactivity of a sample decreases by 59
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2. asked by Erica
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What are the equivalent fraction and decimal for 25%?(1 point) Responses one over twenty-fiveand 0.25 Image with alt text: one
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2. asked by poop
3. 71 views
If business manager deposits $30,000 in a savings account at the end of each year for twenty years what will be the value of her
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2. asked by Mia
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if 60% of a radioactive element remains radioactive after 300 million years, then what percent remains radioactive after 500
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2. asked by Lexi
3. 2,396 views