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?

step-by-step explanation:

x^2 -12x + 36 + y^2 = 36

x^2 + y^2 = 12x

r^2 = 12rcos(theta)

r = 12 cos(theta)

(sin 42)/31. = sinx)/37

sinx = 37 (sin42)/31

= 37× 0.66/31 = 0.787

x= 51.9

other angle opposite to y = 180-51.9-42

= 180- 93.9 =86.1

so

sin42)/31 = sin 86.1)/y

0.021 = 0.997 /y

y= 0.997/0.021 =47.47

need more detail

step-by-step explanation:

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