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spiritcampbell56
31.01.2020 •
Mathematics
The rate of change of a bacteria (n) with respect to time is directly proportional to itself. when t=0, n=500. when t=4, n=3000. how many bacteria will be present when t=8?
carbon-14 has a half-life of 5715 years. find the rate of decay, if the initial amount of carbon-14 is 10 units.
explain (step by step is preferred)
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Ответ:
Fine the average rate of change by the difference in N over the difference in T:
3000 - 500 / 4-0 = 2500 / 4 = 625
This means for every 1 T, N = 625.
Now multiply 625 by 8:
625 x 8 = 5000
When T = 8 N = 5,000
The decay rate can be found by dividing -ln(2) by the half life.
Decay rate = -ln(2) / 5715 = -0.00012
Ответ:
Your answer will be 1.35