Maya is hiking down at a speed of 100 feet per hour.
Step-by-step explanation:
Given that Maya is hiking down a mountain, and after one hours she is at 500 feet elevation while after three hours she is at 300 feet elevation, to determine the speed at which Maya is hiking down the following calculation must be performed:
3-1 = 2
500-300 = 200
200/2 = 100
Thus, Maya is hiking down at a speed of 100 feet per hour.