50. An x-ray technician works 5 days per week, 50 weeks per
year. Assume that the technician takes an average of eight x-rays
per day and receives a dose of 5.0 rem/yr as a result. (a) Estimate
the dose in rem per x-ray taken. (b) How does this result compare
with the amount of low-level background radiation the technician is
exposed to?