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I believe the answer is 57
The grade on the west side would be the vertical rise divided by the horizontal run or 525 divided by 800' or rounded off to 66% (a steep grade as in an underground mine a grade of 25% is considered very steep for vehicles to go up or conveyors to travel). On the east side the 40% grade was obtained by dividing the 525' vertical height by the 1300' run.
Answer:
(3) A"B"C" can be mapped onto A'B'C' by rotating it 180 degrees
Step-by-step explanation:
well, the other two are true, so that only leaves one option, sorry if this is wrong