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28-01-2021
Mathematics

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The half-life of a radioactive substance is 27.7 years.
a. Find the exponential decay model for this substance.
b. How long will it take a sample of 400 grams to decay to 300 grams?
c. How much of the sample of 400 grams will remain after 20 years?

Respuesta :

28-01-2021

Answer:

N(t) = N₀·0.5^(t/27.7)

11.5 years

242.5 grams

Step-by-step explanation:

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