An anthropologist finds there is so little carbon-14 remaining in a prehistoric bone that instruments cannot measure it. this means there is less than 0.2% of the amount of carbon-14 the bones would have contained when the person was alive. how long ago did the person die? (the constant for carbon-14 is 0.00012.)
answer
13,411 years
22,491 years
45,020 years
51,788 years

So here is how we will know how long the person died.
N = I*e^(-kt)
N = I*e^(-0.00012t)
0.002I = I*e^(-0.00012t)
0.002 = e^(-0.00012t)
ln(0.002) = -0.00012t
ln(0.002)/(-0.00012) = t
51788.4008 = t
t = 51788.4008 round it off to 51,788 years
So the correct answer for this question would be the last option, option D.
Hope this answer helps.
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Read the sentences below in 1962, i tried to enroll as the first black student at the university of mississippi. the governor of mississippi blocked my entrance which best describes the verbs used in the sentences? o they are past tense verbs, which are often used in narrative essays o they are past tense verbs, which are not often used in narrative essays. o they are future tense verbs, which are often used in narrative essays o they are future tense verbs, which are not often used in narrative essays.

The density would be 1.622