Hey! if anyone knows the correct answers/matchup to this please let me know :D Directions : find the area of each figure

The graph represents the gallons of water in a water tank with respect to the number of hours since it was completely filled

What is best way to getting answer for my exam is

Stefano accidentally dropped his sunglasses off the edge of a canyon as he was looking down. the height, h(t), in meters (as it relates to sea level), of the sunglasses after t seconds, is shown in the table. during its descent, the pair of sunglasses passed by a climber in the canyon 6 seconds after stefano dropped them. to the nearest meter, what is difference in elevation between stefano and the climber? 166 meters 176 meters 230 meters 240 meters its b.176 i took the test 166 is wrong and 176 is correct