Carbon-14 Is a Radioactive Isotope Which Decays with a Half-Life

Multiple Choice

Carbon-14 is a radioactive isotope which decays with a half-life of 5730 years. What is the first-order rate constant for its decay?

A) 5.25 × 10^-5 yr^-1
B) 1.21 × 10^-4 yr^-1
C) 1.75 × 10^-4 yr^-1
D) 3.49 × 10^-4 yr^-1
E) 3.97 × 10³ yr^-1