First, you can divide 100 by 25. Next, you will figure out that the answer is 4 . Last, you will add 4 +4 =8.
Yes, they are. The correct answer is the middle answer on the picture.
It is 150, you divide the 100 yards by what I am assuming you meant to be two thirds:)
Linear depreciation = ( Total value - Scrap value ) / usefull life
D = V / t