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?

Which is a logical conclusion based on the given information? a. figure abcd is a rhombus by the definition of a rhombus. b. segment ac is congruent to segment dc by cpctc. c. angle acb is congruent to angle adc by the angle-side-angle theorem. d. triangle acd is congruent to triangle cab by the hypotenuse-leg theorem.