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 : /

The management of a supermarket wants to adopt a new promotional policy of giving a free gift to every customer who spends more than a certain amount per visit at this supermarket. the expectation of the management is that after this promotional policy is advertised, the expenditures for all customers at this supermarket will be normally distributed with a mean of $95 and a standard deviation of $20. if the management wants to give free gifts to at most 10% of the customers, what should the amount be above which a customer would receive a free gift?