Write the Word or Phrase That Best Completes Each Statement $55 \%$

Multiple Choice

Write the word or phrase that best completes each statement or answers the question.
-A certain radioactive isotope has a half-life of approximately 1350 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) $1109 \mathrm { yr }$
B) $608 \mathrm { yr }$
C) $1164 \mathrm { yr }$
D) $1555 \mathrm { yr }$