Solve the Problem. -The Half-Life of a Certain Radioactive Substance Is 8 Years

Multiple Choice

Solve the problem.
-The half-life of a certain radioactive substance is 8 years. Suppose that at time t = 0, there are 29 g of the substance. Then after t years, the number of grams of the substance remaining will be:
N(t) = How many grams of the substance will remain after 56 years? Round to the nearest hundredth when necessary.

A) 0.64 g
B) 1.28 g
C) 0.32 g
D) 2.56 g