Two trains leave a station at the same time, heading in the opposite directions. ok be train is traceling at 80 kilometers per hour, the other at 90 kilometers per hour. how long will it take for the trains to be 425 kilometers apart

Situation: find the age of the skull to the nearest year, enter the correct answer. a hiker in africa discovers a skull that contains 32% of its original amount of c- 14. done n = noekt 00000 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