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5. [-/0.36 Points] DETAILS SCALCET8 3.8.011. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Scientist can determine the age of ancient objects by a method called radiocarbon dating. The bombardment of the upper atmosphere by cosmic rays converts nitrogen to a radioactive Isotope of carbon, "C, with a half-life of about 5730 years. Vegetation absorbs carbon dioxide through the atmosphere and animal life assimilates !"C through food chains. When a plant or animal dies, It stops replacing Its carbon and the amount of 14C begins to decrease through radioactive decay. Therefore, the level of radioactivity must also decay exponentially. A parchment fragment was discovered that had about 68% as much 1"C radioactivity as does plant material on Earth today. Estimate the age of the parchment. (Round your answer to the nearest hundred years.) yr Need Help? Read It Watch It 6. [-/0.41 Points] DETAILS SCALCET8 3.8.014. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A curve passes through the point (0, 7) and has the property that the slope of the curve at every point P is twice the y-coordinate of P. What Is the equation of the curve? (Use x as the Independent variable.) y(x) = Need Help? Rand It