A typical abdomen CT scan exposes a person to about 20 mGy radiation. How much is this dose in rad units? How many joules are absorbed by a woman if she weighs 60 kg?

Radioactive iodine (I-131) can be used to treat hyperthyroidism in adults. The recommended maximum activity (dosage) for the treatment is 10 mCi. Determine the value of this radiation in disintegrations per second and in becquerels.