Summarize the free ice corridor theory

The Ice-Free Corridor hypothesis (or IFC) has been a reasonable theory for how human colonization of the American continents occurred since at least the 1930s. ... In 1840, Louis Agassiz put forward his theory that the continents had been covered by glacial ice at several points in our ancient history

Explanation:

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The Ice-Free Corridor hypothesis or IFC has been a reasonable theory for how human colonization of the American continents occurred since at least the 1930s. ... In 1840, Louis Agassiz put forward his theory that the continents had been covered by glacial ice at several points in our ancient history.

Explanation:

where is the passage?

can't without the passage.

post the full question.

254.34

step-by-step explanation:

the formula for area of a circle is given by

a = pi * r^2

a = pi * 9^2

a = 81*pi

using 3.14 as an approximation for pi

a = 3.14*81

a = 254.34