7. A radioactive isotope decays at a rate y'(t) = -ky(t) proportional to the amount y(t) remaining at time t. Express the half-life of the isotope in terms of the constant k. The half-life means the time it takes for y(t) to reach one half of its initial value y(0).

Q: please help thank you

A:

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Q: Ho te

A: Note As you don't mention what to find .i am just simplify

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A: Given below the detailed solution

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A: First 2 step is correct.

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A:

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A: To find the correct option

Q: Number 18

A:

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Q: When I checked it says the answer is

A: The solution is given below :