Askier has decided that on each trip down a slope, she will do 2 more jumps than before. on her first trip she did 6 jumps. derive the sigma notation that shows how many total jumps she attempts from her fourth trip down the hill through her twelfth trip. then solve for how many total jumps she attempts from her fourth trip down the hill through her twelfth trip.

i tried to answer, but i don't really know how to even set it : /

I'll just manually compute this one. Every attempt she will add 2 more jumps.

Attempt           Jumps       Accumulated Jumps
1                          6                         6
2                          8                       14
3                         10                      24
4                         12                      36
5                         14                      50
6                         16                      66 
7                         18                      84
8                         20                    104
9                         22                    126
10                       24                    150
11                       26                    176
12                       28                    204

Total jumps from 4th trip through 12th trip: 204 - 24 = 180 jumps

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