A radioactive source emits 24MeV neutrons at the rate of 710

A radioactive source emits 2.4-MeV neutrons at the rate of 7100 neutrons per second. The number of atoms in the source is 2.6 x 10^9. What is the activity of the source, in curies (Ci)? (1.00 Ci = 3.70 × 10¹⁰ Bq)

190 nCi

1900 nCi