MTH $154$ Discussion C$4$UAB

Note, Monthly Cash Flow $=$ Monthly Income $-$ Monthly expenses

$1$a$-$ What does it mean when you have positive monthly cash flow?

$1$b$-$ What does it mean when you have negative monthly cash flow?

Money in a bank with compound interested rate:

$2$a$-$ write the bank account balance formula for compound interest

$2b-$ rewrite above formula when $n=1($called simple annual interest$)$