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# In 90 seconds, the mass of a radioactive element reduces to $$\frac{1}{16}$$ of ...

### Question

In 90 seconds, the mass of a radioactive element reduces to $$\frac{1}{16}$$ of its original value. Determine the half- life of the element.

A) 15.0s

B) 18.0s

C) 22.5s

D) 30.0s

E) 45.0s