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

Which of the following statements best characterizes changes to agriculture in the united states since 1900? a. increased mechanization has reduced the need for labor.b. increased mechanization has increased the need for water, thereby increasing the need for labor.increased mechanization has increased the use of land, thereby increasing the need for labor.d. increased mechanization has increased food production, thereby increasing the need for labor. select the best answer from the choices provided.