Looking for any of the first 5 questions answered if multiple can be answered thats even better

Agrain trader buys the following amounts from three suppliers: 3,200 pounds, 5,100 pounds and 700 pounds. what is the total weight of his purchase?

When y’all answer can y’all explain too !

For the following geometric sequence, find the recursive formula. {-80, 20, -5, } i need : ')