Solve the Problem $55 \%$ Of That Amount?
A) 1584 Years
B) 1639 Years
C)

Multiple Choice

Solve the problem.
-A certain radioactive isotope has a half-life of approximately 1900 years. How many years to the nearest year would be required for a given amount of this isotope to decay to $55 \%$ of that amount?

A) 1584 years
B) 1639 years
C) 855 years
D) 2189 years