You have to pay more attention at class to understand the question dummmie..!!
I was reading on this awhile ago and it was Sub-Sahara Africa, where the most child deaths are.
hope this helps :)))
Answer:
Explanation: its asking youngest to oldest, use the law of super position, layer c would be the oldest and layer B would be the youngest,
definition of the law of super position- Law of superposition, a major principle of stratigraphy stating that within a sequence of layers of sedimentary rock, the oldest layer is at the base and that the layers are progressively younger with ascending order in the sequence. ... It is one of the great general principles of geology.
Ok, so on the top, the angle is 100 degrees on a line, a line is a 180 degree angle so the angle to the left of that top angle is 80 degrees, 80 - 10 would give you the answer for x because (x + 10) is equal to the angle to the left of the 100 degree angle