alliejoy20
contestada

How much of a radioactive substance must be presented to decay to 40 grams in 9 years if the half-life of the substance is 4.6 years?

Respuesta :

amna04352

Answer:

155.25 grams

Step-by-step explanation:

40 = X(½^(9/4.6))

X = 40 ÷ (½^(9/4.6))

X = 155.25 grams

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