Atractor costs $12,250 and depreciates by 6% per years. how much will the tractor be worth after 6 years?

Ican figure out 20 shares multiply by $117.98 =2359.6920 shares multiply by $124.32=2486.40then take 40 shares multiply by $128.48=5139.20after that i'm lost any be greatly appreciated.

Can someone me and plz do the problem

What is the image of c for a 90° counterclockwise rotation about a? (3, 7) (-1, 3) (7, 3)