The half life for the decay of radium is 1620 years. What is the rate constant for this first-order process?
a. 4.28 x 10 to the -4 yr to the -1
b. 1.12 x 10 to the -4 yr to the -1
c. 2.33 x 10 to the -4 yr to the -1
d. 8.91 x 10 to the -4 yr to the -1
e. 6.17 x 10 to the -4 yr to the -1