Solve the problem.A certain radioactive isotope decays at a rate of 0.275% annually. Determine the half-life of this isotope, to the nearest year.

A. 182 yr
B. 252 yr
C. 109 yr
D. 3 yr

Answer: B

Mathematics

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C.

D.

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A. y is multiplied by 125 B. ?y is multiplied by 243 C. 125 is added to y D. 243 is added to y

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A. -10 B. 15 C. -15 D. 10

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Write in decimal notation.3.45 × 104

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