If the Amount of a Sample of Radioactive Substance That $Q ( t ) = Q _ { 0 } e ^ { - 0.0003 t }$

True/False

If the amount of a sample of radioactive substance that remains after t years is given by $Q ( t ) = Q _ { 0 } e ^ { - 0.0003 t }$ and 500 grams of the substance remain at the end of 7,000 years, then there were about 4,083 grams present initially.