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tekilochka [14]

3 years ago

7

A hiker in Africa discovers a skull that contains 32% of its original amount of C-14. Find the age of the skull to the nearest y

ear.

1 answer:

kap26 [50]3 years ago

6 1

Answer:you know that N=0.41No so if you sub that in the No's cancel and you get 0.41=e^-kt.

solving for t you get t=(ln0.41)/(-k)=8915.98=8916 (to the nearest year)

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What expressions represent 1/3 times the sum of 8 and 4

san4es73 [151]

Answer:

1/3 * (8 + 4)

Step-by-step explanation:

Expression which represents 1/3 tines the sum of 8 and 4

Expressing mathematically,

Sum of 8 and 4 is written as (8 + 4)

1/3 of the sum is expressed as ; 1/3 x (8 + 4)

Hence,

1/3 * (8 + 4)

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Expression is 1/3 * (8 + 4)

Result = 4

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Step-by-step explanation:

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$\displaystyle x=f(y)\\\\x=5(y-4)^3+6\\\\x-6=5(y-4)^3\\\\\frac{x-6}{5}=(y-4)^3\\\\\sqrt[3]{\frac{x-6}{5}}=y-4\\\\y=4+\sqrt[3]{\frac{x-6}{5}}\\\\\boxed{f^{-1}(x)=4+\sqrt[3]{\frac{x-6}{5}}}$

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