1. If the elevation of Lake Superior is 600 feet above sea level and the elevation of the Caspian Sea is 92 feet below sea level, find the difference of the elevations.
2. Josh Weidner has $142 in his checking account. He writes a check for $125, makes a deposit of $43, and then writes another check for $85. Represent the balance in his account by an integer.
3. Some roller coasters travel above and below ground. One such roller coaster is Tremors, located in Silverwood Theme Park, Athol, Idaho. If this coaster rises to a height of 85 feet above ground, then drops 99 feet, how many feet below ground are you at the end of the drop?
4. Go to the bar graph for Review below Exercises and find the total length of the elevator shaft for Elevator C.