Question

A radioactive element decays at a rate of 5.25% annually. There are 35 grams of the substance

present. How much of the substance remains after 12 years (Round to the nearest hundredth)?
TEKS A2.5(B)(D)

Answer 1

18.32 gm

Explanation:

= 35 ( 1-.0525)^12 = 18.32 gm remain