Question

the graph models the decay of a sample of iodine - 125, where x is the time that has passed and y is the amount remaining in the sample in grams. what was the size of the sample at the beginning of the experiment? 12.5 grams 25 grams 50 grams 120 grams (0,50) (60,25) (120,12.5)

Explanation:

Step1: Identify the initial - time point

At the beginning of the experiment, \(x = 0\).

Step2: Find the corresponding \(y\) - value

When \(x = 0\), from the graph, the point is \((0,50)\), so \(y=50\).

Answer:

50 grams