It’s C! that’s the answer, hope it helps
Note: a radioactive decay constant is always negative.
time = [natural log(ending amount / beginning amount)] / k
time = ln (20 / 24) / -.00011
time = ln (5/6) / -.00011
time = -.018232155683 / -.00011
time =
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<span>
165.7468698455
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</span>
</span>
time =
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<span>
165.75 years
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Answer:-2/3
Step-by-step explanation: