7. The half-life of carbon-14 is about 5730 years. (Lesson 4-7) a. Complete the table, which shows the amount of carbon-14 remaining in a plant fossil at the different times since the plant died. b. About how many years will it be until there is 0.1 picogram of carbon-14 remaining in the fossil? Explain how you know. Years 0 5730 2.5730 3.5730 4.5730 Picograms 3​