On this problem you don't need to subtract. They want to know the total amount of people who attended so you would add.
1 1 1 (carried over numbers)
12,679 (Line it up with 8491, ones place to ones place and so on)
+8,491
21170 (answer)
They're most likely referring to urban sprawl, which is usually associated with rapid, less thoughtfully planned development.
It's usually thought of in a negative light, because the neighborhoods that develop lack the amenities, infrastructure, and/or identity of traditional neighborhoods. And because they're on the edges of cities, everyone usually relies on cars, which leads to traffic jams, pollution, and a lack of sense of community.
Answer:
When studied carefully, the similar vegetation zones are mirrored in terms of their geographical occurrence, when considering the equator as the divisor.
Explanation:
The location where similar vegetation zones occur are almost mirrored, when the equator is considered as the divisor. Excluding the extreme desert regions of the northern parts of Africa, the grasslands and rain forests occur in similar locations above and below the equator.
This can be explained due to the fact that there are similar climatic conditions in such regions, due to their similar distance from the equator.
<em>This can better be understood by studying the vegetation patterns from the edited map extract below </em>