Algebra II Study Guide help?

Ben earns $55,000 per year. A cost-of-living increase of $600 is added to his salary each year.

Is this an arithmetic sequence or a geometric sequence? Why or why not?

How much will Ben earn after 30 years?
Added (1). Samantha adds 5 pennies to her penny collection each day.

How could you change the above scenario to make it a geometric series rather than an arithmetic series?

Using you geometric series from part a, how many pennies would Samantha have in total after 10 days?
Added (2). Alex has a home mortgage of $145,000. He makes a payment of $830 every month.
Write a sequence showing the balance for the first 10 months.
What kind of sequence is this and how do you know (arithmetic, geometric)?
When will the balance be less than $100,000?

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