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2.The number of grams A of a certain radioactive substance present at time, in yearsfrom the present, t is given by the formulaA= 45e-0.0045ta. What is initial amount of this substance?

Answer :

Since the formula:

[tex]A=45e-0.0045t[/tex]

Corresponds to a linear funtion, t as the variable.

The inicial amount of this substance is the independent value (suposse t=0), in this case 45e.

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