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Mathematics (09) Practice Test - MTELs
Mathematics (09) Practice Test - MTELs
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Mathematics (09) Practice Test42. Carbon 14 decays exponentially with a half-life of 5750 years,the time it takes <strong>for</strong> one half of the carbon 14 to decay. If C 0isthe original concentration of carbon 14, which of the followingfunctions correctly approximates C(t), the quantity remainingas a function of time, t, in years?A. C(t) = C 0e – 0.000052tB. C(t) = C 0e – 0.00012tC. C(t) = C 0e – 2875tD. C(t) = C 0e – 5750t43. Use the expression below to answer the question thatfollows.Bn(x + 5) 4 – 2Bn(x + 5) 3Which of the following is equivalent to the expression above?A. –2Bn(x + 5)B.23Bn(x + 5)C. [Bn(x + 5)] –2D. [Bn(x + 5)] 2 326
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