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Julie has 250 grams of a radioactive substance. The substance

Julie has 250 grams of a radioactive substance. The substance decays every hour. How long will it take until she has 20 grams of
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2. asked by Sozy
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part 1 A scientist begins with 250 grams of a radioactive substance. After 250 minutes, the sample has decayed to 40 grams.
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2. asked by Meg
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The half-life of a radioactive substance is one day, meaning that every day half of the substance has decayed. Suppose you have
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A scientist has 37 grams of a radioactive substance that decays exponentially. Assuming k=-0.3,how many grams of radioactive
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2. asked by Marissa
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A lab technician had 58 grams of a radioactive substance. Ten days later, only 52 grams remained. Find the half-life of the
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2. asked by Anonymous
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A radioactive substance decays according to the formula A=A0e^ktwhere A0 is the initial amount of substance (in grams) A is the
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2. asked by enhle
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Julie and Diego are conducting an investigation to identify an unknown substance. They observe that the substance has a mass of
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a radioactive substance decays at an annual rate of 24 percent. If the initial amount of the substance is 640 grams, which of
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2. asked by lilly
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a radioactive substance decays at an annual rate of 24 percent. If the initial amount of the substance is 640 grams, which of
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2. asked by lilly
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a certain radioactive substance is decaying so that at time t, measured in years, the amount of the substance, in grams, is
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2. asked by Sara
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