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2 years ago

8

The diameter of the circle is 24m.Tim incorrectly says that the circumference of the circle is about 37.68 m.What is the circumf

erence of the circle. What mistake did Tim make

1 answer:

Alja [10]2 years ago

4 0

If the diameter is 24 then you multiply that by pi to get the circumference

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Answer:

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Step-by-step explanation:

We know that

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An old bone contains 80% of its original carbon-14

so,

P(t)=0.80Po

we can plug it and then we solve for t

$0.80P_0=P_0(\frac{1}{2})^{\frac{t}{5730} }$

$0.80=(\frac{1}{2})^{\frac{t}{5730} }$

$\ln \left(0.8\right)=\ln \left(\left(\frac{1}{2}\right)^{\frac{t}{5730}}\right)$

$t=-\frac{5730\ln \left(0.8\right)}{\ln \left(2\right)}$

$t=1844.6479$

So,

An old bone contains 80% of its original carbon-14 in 1844.6479 years

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