On Monday at 1 p. m., when the ocean’s surface was at an elevation of 2.2 feet, Winston went to a surf shop that was 8.2 feet above the ocean’s surface. At 7 p. m. when the ocean’s surface was at an elevation of -2.4 feet, Winston ate dinner at a restaurant whose deck was 10 feet above the ocean’s surface. Part A
What was the net change in the elevation of the ocean’s surface from 1 p. m. to 7 p. m.?


=5.4 feet
the distance between the deck and the ocean's surface is 5.4 feet

How many feet apart are the two ocean elevations described in part A?

Part C
What is the elevation of the deck where Winston ate dinner?

Part D
What is the elevation of the surf shop?

Part E
What was the distance between the deck and the ocean’s surface at 1 p. m.? Which was higher, the deck or the ocean?

Part F
What was the distance between the surf shop and the ocean’s surface at 7 p. m.? Which was higher, the surf shop or the ocean?