We can just add all these numbers together because they are just addition and subtraction.
We assume the miner starts at 0 (the surface).
0 - 1200 (down) + 900 (up) - 350 (down) = -650 (C)
The answer is 242 your welcome
The terminating decimal i believe is 0.28. Hope i helped u???
4r
That is the expression. Every poster costs $4, so multiply that by however many posters he buys (r).
