Biology, 07.10.2019 17:20, jessicawolfking
Alogarithm is the power to which a base is raised to produce a given number x. for example, if the base is 10 and x = 100, the logarithm of 100 equals 2 (because 102 = 100). a natural logarithm (ln) is the logarithm of a number x to the base e, where e is about 2.718. natural logarithms are useful in calculating rates of some natural processes, such as radioactive decay. the equation f = e –kt describes the fraction f of an original isotope remaining after a period of t years; the exponent is negative because it refers to a decrease over time. the constant k provides a measure of how rapidly the original isotope decays. for the decay of carbon-14 to nitrogen-14, k = 0.00012097. you can rearrange this equation to solve for t by following these steps: take the natural logarithm of both sides of the equation: ln(f) = ln(e –kt ). rewrite the right side of this equation by applying the following rule: ln(ex ) = x ln(e). since ln(e) = 1, simplify the equation. now solve for t in the form "t = "t = log10(f)−kt = ln(f)ln(e−k)t = ln(f)−k∗ln(e)t = ln(f)−k ( correct answer)the equation t = ln(f)−k enables you to calculate the age (t) of an ancient seed based on the fraction of carbon-14 remaining (f). the constant k is the rate at which carbon-14 decays to nitrogen-14, leading to a decline in carbon-14 over time
Answers: 3
Biology, 21.06.2019 15:30, savannahwonder
On a floor there are several 1-4 mm elongated drops leading away from a body lying in a pool of blood. the the forward wall there is a sigzag pattern and on the walls to the right side there is a linear patter
Answers: 1
Biology, 22.06.2019 12:30, kaybaby23
50 points! which of the following is an inference? a burning candle is extinguished when it is covered with a jar. the candle burns longer than expected in a jar that has a plant in it. a plant lives longer than expected in a jar that has a burning candle. there is more oxygen in the jar because there is a plant in it.
Answers: 2
Alogarithm is the power to which a base is raised to produce a given number x. for example, if the b...
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