What was the net change in the elevation of the ocean's surface from 1 p. m. to 7p. m.?

4.6

Step-by-step explanation:

The net change is found by subtracting the starting number from the change. 2.2 minus -2.4 is 4.6. If this is wrong I apologise.

δabc ≅ δdcb by sas because

db ≅ ac . . given (side)

bc ≅ bc . . reflexive property (side)

∠dbc ≅ ∠ acb . . alternate interior angles where transversal bc crosses parallel lines bd and ac (included angle)

never fear papaguy is here

answer