We can use the multiplication principle of counting to find the total number of possible outcomes.
Since there are 5 options on the first spinner, 6 options on the second die, and 3 options on the third spinner, there are a total of:
5 x 6 x 3 = 90
different possible outcomes.
Therefore, there are 90 different possible outcomes if Madelyn spins a spinner with 5 equal-sized sections labeled Monday, Tuesday, Wednesday, Thursday, Friday, rolls a fair die in the shape of a cube that has six sides labeled 1 to 6, and spins a spinner with three equal-sized sections labeled Walk, Run, Stop.