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El numero de Q en miligramos presentes de una sustancia radioactiva después de T años, esta dado por:
Q=e -0,35T (el -0,35T es *e* elevando en eso)
a) Cuantos miligramos están presentes después de 10 años?
b)¿Luego de cuantos años su cantidad será 20 miligramos?


Sagot :

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