150 20 20 30 25 15 100 20 10 10 15 10 50 5 2000 4000 6000 8000 10 000 2000 4000 6000 8000 10 000 2000 4000 6000 8000 10 000 2000 4000 6000 8000 10 000 Let Q represent a mass (in grams) of carbon ( C), whose half-life is 5,715 years. The quantity of carbon-14 present after t years is given by the following Q = 11/1 6/5.715 a) Determine the Initial quantity (when t = 0). (b) Determine the quantity present after 2000 years. (Round your answer to two decimal places.) (c) Sketch the graph of the function over the interval t = 0 to t = 10,000. 8 20 50 2000 4000 6000 2000 10000 2000 4000 6000 BOOD 10000 2000 4000 6000 8000 10000 2000 4000 6000 8000 10000 O