A scientist performed an experiment with a radioactive substance whose half-life is 22 min. During the experiment, a fire alarm went off. The scientist will sketch a graph of the situation, where x re

A scientist performed an experiment with a radioactive substance whose half-life is 22 min. During the experiment, a fire alarm went off. The scientist will sketch a graph of the situation, where x represents the time after the fire alarm went off, and y represents the amount of radioactive substance remaining at that time.

The scientist will only sketch the graph in the quadrant or quadrants for which it makes sense to.

In which quadrant or quadrants will the scientist sketch the graph?

Quadrant I only