Answer:
1/2
Step-by-step explanation:
3-4 -1 1
----------- = ---------- = ---
-14-(-12) -2 2
8/12 in simplest form is 2/3.
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 =
<span>
<span>
<span>
165.7468698455
</span>
</span>
</span>
time =
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<span>
<span>
165.75 years
</span></span></span>