The number of grams of a radioactive isotope present after t years is
. What does 1,500 represent if ?
A.
the number of grams of the radioactive isotope present after
year
B.
the number of grams of the radioactive isotope present after 2 years
C.
the final number of grams of the radioactive isotope present
D.
the original number of grams of the radioactive isotope present