The population of a city was 60,000 in 2015. In 2016, the population of the city was 63,000. The percent increase in the populat
ion from 2015 to 2016 was the same as it was from 2016 to 2017. What was the population of the city in 2017?
1 answer:
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Answer:
A) 277 million years
Step-by-step explanation:
Here, decay of U-238 is first order reaction. (since most of the nuclear decays are first order).
so, the equation t = × ln(
)
where, t = time from start of reaction
k = reaction constant
A(0) = initial concentration; A = present concentration.
⇒ 4.5 billion = 4500 million years = × ln2.
Now, given 95.82% of parent U-238 isotope is left.
⇒ t = × ln(
)
t = × ln(
)
⇒ t ≅ 277 million years.