Maria counted the number of snowmen she saw each day what is the median number of the snowman 0 2 3 3 6 7 12

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.

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?

What’s the answer ? use the picture to see the problem