please help with detailed explanation

QUESTION 4 Given that a C-14 atom has not decayed for 6,500 years, what is the probability that it will decay after 7,000 years? P(X > 7000 | X > 6500) Round your answer to four decimal places QUESTION S The half-life of a radioactive substance is the amount of time it takes for 50% of a sample to decay. In this case, how long does it take for 50% of a C-14 atom to decay to N-147 (What is the time interval associated with 509% probability of decay?) P(X