Find the first, fourth, and eighth terms of the sequence a(n)= -3*2^n-1 a.)1; -216; -279936 ; -96; -1536 ; -24; -384 ; -48 ; -768

Simple, plug in 1, 4, and 8 for n and solve.
-3×=-3
-3×=-24
-3×=-384

So answer choice C

1. 0.3 •4 is the same as 4 groups of 0.32. 7•0.8 is the same as 7 groups of 0.83. it increases by 0.5 every time, so 0.5x4 it increases by 0.9 every time, so 0.9x5. 0.9•12=10.86. 0.47•5=2.35i can finish the next ones in a separate post