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.?

part b
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?