When a radioactive substance decays, measurements of the amount remaining over constant Amount of radioactive substance remaining
intervals of time form a geometric sequence. The table shows the amount of a certain substance,
remaining after different constant intervals. Write the explicit and recursive formulas for the
Time (min)
0 100 200 300
geometric sequence formed by the amount of the radioactive substance remaining
Amount (picograms)
480 240 120 60
The explicit formula for the geometric sequence formed by the amount of the radioactive substance remaining is an-(Type your answer using exponential
notation)