Answer:
Step-by-step explanation:
The inverse of a function is when the x and y are swapped. So the first step is to write f(x) as y and then swap the x and y
Original Equation:
write f(x) as y (since that's what it represents)
Swap x and y
Square both sides
Add 1 to both sides
So this gives you the equation:
Half-Life = ln (.5) / k
Half-Life = .693147 / .00011
Half-Life =
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6,301 years
For a radioactive substance to decay to 25%, it has to go through 2 halflives.
2 * 6,301 = 12,602 years
approximately 12,600 years
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Answer:
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Step-by-step explanation: