teakers12 teakers12

19-12-2018
Mathematics

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Simple Math Question Please Help.

If a radioactive substance with a mass of 64 grams decays at a rate of 25% every hour modeled by the equation m(x) = 64(0.75)x then how many grams will remain in 3 hours?

Respuesta :

tramserran tramserran

19-12-2018

Answer: 27 grams

Step-by-step explanation:

m(x) = 64(0.75)ˣ

m(3) = 64(0.75)³

= 64(.421875)

= 27

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