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Juliette [100K]
3 years ago
9

What caused virtually all of Canada and some of the northern US to be once covered by thick glacial ice almost 15,000 years ago?

Social Studies
1 answer:
geniusboy [140]3 years ago
3 0
Changes in the earth's climate caused ice sheets to grow and cover most of Canada and some of the northern US almost 15 000 years ago. This is known as the last Ice Age. For the last two million years, the earth has shifted between ice ages and warmer periods. Ice ages are caused by slight changes in the way the earth orbits around the sun. Huge continental glaciers or sheets of ice moved down from the Artic and covered Canada, North America and much of Europe. 

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How many infants with at least one birth defect would we expect among the 837 ivf infants if the true prevalence of at least one
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According to the CDC, Central for Disease Control, 1 and 33 infants are born each year with a brith defect.  If the the rate for a least one birth defect for ivf infants is the same as infants conceived naturally then, in a group of 837 ivf infants there would be about 25 infants born with birth defects.


That answer was found by dividing 837 by 33.

837/33= 25.364

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If a product is sold at the price indicated and supplied in the quantity indicated by the intersection of the supply and demand
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