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Korvikt [17]
3 years ago
10

Some colleges now offer massive open online courses (MOOCs), where students do not need to be in the same classroom as their ins

tructors. The fixed cost of an online course is relatively ________, but after the courses are placed online, the marginal cost of providing instruction to an additional student is ________.
Social Studies
1 answer:
bija089 [108]3 years ago
6 0

Answer:

(1) Average

(2) High

Explanation:

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In U.S., the group that is at high risk for food insecurity except Asian households. The correct option is A.

<h3>What is food insecurity?</h3>

Food insecurity refers to both a lack of sufficient food (quantity) and a lack of sufficient healthy food (quality).

Hunger is inextricably linked to a lack of financial or monetary resources.

Asian households have lower risk of food insecurity

Thus, the correct option is A, Asian household.

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Answer:

GLACIAL DEPOSITS

Today, glacial deposits formed during the Permo-Carboniferous glaciation (about 300 million years ago) are found in Antarctica, Africa, South America, India and Australia. If the continents haven’t moved, then this would suggest an ice sheet extended from the south pole to the equator at this time - which is unlikely as the UK at this time was also close to the equator and has extensive coal and limestone deposits. If the continents of the southern hemisphere are re-assembled near the south pole, then the Permo-Carboniferous ice sheet assumes a much more reasonable size.

More evidence comes from glacial striations – scratches on the bedrock made by blocks of rock embedded in the ice as the glacier moves. These show the direction of the glacier, and suggest the ice flowed from a single central point.

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