What is the last number to put in the following question i am confused ..

A33 gram sample of a substance that's used to detect explosives has a k-value of 0.1473. n = noekt no = initial mass (at time t = 0) n = mass at time t k = a positive constant that depends on the substance itself and on the units used to measure time t = time, in days

Afootball is throw by a quarterback to a receiver

How many grams the dog will eat in 3 days?