Ally dropped a stone from the top of a cliff. The height of the stone throughout its flight is shown below. Select the most appropriate unit to measure the amount of time that the stone remains in the air. A. milliseconds B. hours C. seconds D. minutes

Situation: an archaelogist in turkey discovers a spear head that contains 54% of its original amount of c-14. n = noekt no = inital amount of c-14 (at time t = 0) n = amount of c-14 at time t k = 0.0001 t = time, in years find the age of the spear head to the nearest year