The half-life of cesium-137 is 30 years. Suppose we have a -mg sample. Find the mass that remains after years.

Question

The half-life of cesium-137 is 30 years. Suppose we have a  -mg sample. Find the mass that remains after  years.

Quizplus · Accepted Answer

We can use the formula $A=A_0\left(\frac{1}{2}ight)^{\frac{t}{	ext{half-life}}}$. Plugging in the given values, we get $A=11eaa3e5\_5557\_8a08\_9f8f\_dfbba979b4d8\_TB5971\_11\left(\frac{1}{2}ight)^{\frac{11eaa3e5\_5557\_b119\_9f8f\_b9a7f78d98b7\_TB5971\_11}{30}}\approx 11eaa3e5\_5557\_d82d\_9f8f\_f3fdfe21f4a2\_TB5971\_11$. Therefore the answer is $\boxed{	extbf{(D)}}.$

The Half-Life of Cesium-137 Is 30 Years