An old bone contains 80% of its original carbon-14. Use the half-life model to find the age of the bone. Find an equation equivalent toP (t) = A (one-half) Superscript StartFraction t Over 5,730 EndFraction A times P (t) = (one-half) Superscript StartFraction t Over 5,730 EndFraction 5,730 times P (t) = A (one-half) t StartFraction P (t) Over A EndFraction = (one-half) Superscript StartFraction 5 Over 5,370 EndFraction