Answer :
Final answer:
The equation given represents the decay of iodine-123. By solving for the time it takes for the level of iodine-123 to drop to 50μCi, is 39.3 hours. so,the correct option is:(c) 39.3 hr
Explanation:
The equation $Q = 650(\frac{1}{2})(\frac{1}{13.1})$ represents the decay of iodine-123. To determine the time it takes for the level of iodine-123 to drop to 50μCi, we need to calculate the value for Q when it equals 50. By setting up and solving the equation, we can find the time, which is 39.3 hours.
