Fluorine-18 is a radioactive isotope used as a tracer in PET scans. It has a half-life of 110 minutes.
A dose of Fluorine-18 is prepared with an initial activity of 5.6×108 Bq5.6 \times 10^8\text{ Bq}5.6×108 Bq.
Calculate the activity of the sample after 5.5 hours.