What trig function do i use for this problem?

The train station clock runs too fast and gains 5 minutes every 10 days. how many minutes and seconds will it have gained at the end of 9 days?

You have 138.72 in your saving account u take out 45.23 and 18.00 you deposit 75.85 into your account

Graph the equationy=x^2 -[tex]y = x^{2} - 2[/tex]