Can someone help me with this?

The table shows the balance of a money market account over time. write a function that represents the balance y(in dollars) after t years.

Maria walks a round trip of 0.75 mile to school every day. how many miles will she walk in 4.5 days

Jamie went to home depot. she bought 25 bags of soil that cost $9 per bag. she bought 15 pots at $8 each, and she bought 23 bags of pebbles at $15 each. she used a coupon that gave her $5 off for every 100 dollars she spent. how much did jame pay at the end?