The area of the surface of a sphere is described by the formula, where the radius of the sphere. The earth has a radius of 3,960 miles and dry landforms approximately 29.9% of the Earth's surface. Assuming that 57% of the dry land on Earth is uninhabitable, what is the surface area of the habitual land on Earth?

< coa = 150 ( given)

as ba and bc are tangents

so oc and oa is perpendicular to cb and ab respectively because in circle normal passes through centre

so in quadrilateral oabc

< coa + < oab + < ocb + < abc = 360

150 +90+90 + < abc = 360

330 + < abc = 360

< abc = 360 -330 = 30

so < abc = 30

⭐dhruv⭐

goog may be able to you find that answer

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step-by-step explanation:

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