A Sample That Contains 5

A sample that contains 5.7×10 ^{- 9} mol of ⁹³Zr decays at a rate of 3.02×10³ disintegrations per minute. What is the half-life of ⁹³Zr?
(1 year = 5.256×10⁵ minutes)

A) 1.0×10⁶ years
B) 1.5×10⁶ years
C) 2.2×10⁶ years
D) The half-life cannot be found from this information.
E) none of these