s855753
17.12.2019 •
Mathematics
Nickel-63 has half-life of about 96 years. after 336 years,about how many milligrams of an 800 mg sample will remain?
a)14 mg
b)71 mg
c)229 mg
d)656 mg
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Ответ:
.5=r^96
ln(.5)=96lnr
ln(.5)/96=lnr
r=e^((ln.5)/96)
f=800e^(336(ln.5)/96)
f=70.71
So about 71mg will remain after 336 years.
Ответ:
answer:
b. a novel which is english
step-by-step explanation:
if there are only 3 japanese books and 5 english books she has a better chance of getting english because there are more.