Can someone help me solve these problems. It would be best if work was shown.
1)Find the partial sum S9 of: 2.2, 7.4, 12.6,...............43.8
2) Use the binomial theorem to expand and simplify (3a-2b^-1)^5
3) A ball is dropped from a height of 40ft. Each time it strikes the ground, it rebounds to a height 70% of the distance it fell. Find the total distance the ball travels.
1)Find the partial sum S9 of: 2.2, 7.4, 12.6,...............43.8
2) Use the binomial theorem to expand and simplify (3a-2b^-1)^5
3) A ball is dropped from a height of 40ft. Each time it strikes the ground, it rebounds to a height 70% of the distance it fell. Find the total distance the ball travels.