500
Yolanda the Yeti is snorkeling underwater 5 feet below sea level. She travels straight down at a speed of 4 feet every second for 15 seconds. She then travels directly up at a speed of 3 feet every second for 10 seconds. What is Yolanda’s position, measured in feet, in the ocean after this 25 second period?
What is -25 feet or 25 feet below sea level?