2-4 pls help I'm confused about this

If a(0,0,0) and b(2,2,2) are points in coordinate space, how many paths are there from a to b that move from one lattice point to another in the positive x-,y- or z- direction?

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

Jim had 3,067.48 in his checking account he wrote a check to pay for two airplane tickets. his account now has 1,845.24.