Can somebody check my math before I submit it? Thanks.

Question

1. Answer: Arithmetic Sequences
2. Answer: 60, 66, 72, 78, ...
3. Answer: t(n + 1) = t(n) + 6, t(1) = 60
4. Answer: Geometric Sequence
5. Answer: 3,000,000 , 3,120,000 , 3,444,800, ...
6. Answer: t(n + 1) = t(n) + 1.04 , t(1) = 3,000,000

Answer 1

all but 6
t(n) = 3,000,000(1.04)^n

Answer 2

#6 is also correct, since they asked for recursion.