The Decay of a Radionuclide with a Half-Life of 3

The decay of a radionuclide with a half-life of 3.3 × 10⁵ years has a rate constant (in yr^-1) equal to ________.

A) 4.8 × 10⁵
B) 2.1 × 10^-6
C) 4.2 × 10^-6
D) 2.8 × 10³
E) 5.9 × 10^-8