Parker has a bag that contains orange chews, apple chews, and lime chews. He performs an experiment. Parker randomly removes a c
1 answer:
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Solution
In order to find greatest to least number, we have to convert the given fractions into decimals.
3 % = 3 + 1/10 = 3 + 0.10 = 3.10%
3 % = 3 + 2/5 = 3 + 0.40 = 3.40%
3 %= 3 + 0.25 = 3.25%
3 % = 3 + 0.33 = 3.33%
Now we can easily, compare the numbers and write from greatest to least.
3.40%, 3.33%, 3.25%, 3.10%
Greatest to least = 3 2/5%, 3 1/3%3, 3 1/4%, 1/10%,
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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.