6. Dr. Lopez injects a patient with 280 milligrams of a
safe radioactive dye that decays exponentially. After 17
days, there are 142 milligrams of dye remaining in the
patient's system.
Assuming that the radioactive dye decays at a
continuous rate, write an exponential model for this
situation in terms of t, the number of hours passed.
Round to two decimal places, when necessary.