Use sigma notation to represent the sum of the first six terms of the following sequence: 4, 12, 20, … the summation from n equals 1 to 6 of negative 4 plus 8 times n the summation from n equals 1 to 6 of 4 plus 8 times n the summation from n equals 1 to 6 of negative 1 plus 8 times n the summation from n equals 1 to 6 of 1 plus 8 times n

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