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If 60% of a radioactive element remains radioactive after 400 million years, then what percent remains radioactive after 500 million years? what is the half-life of this element?
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Select all the correct answers. what is 221,000,000,000,000,000,000 expressed in scientific notation?
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Solve each quadratic equation by factoring and using the zero product property. 10x + 6 = -2x^2 -2
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If 60% of a radioactive element remains radioactive after 400 million years, then what percent remai...
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