Question

1 )The earth is approximately a sphere of diameter 12742 km. The surface area of a sphere is given by the formula A = 4πr² . Calculate the surface area of the earth. Give your answer in meters square and in standard form. 2) Simplify ∛(64r⁻⁶) ¹/² 3) If 18²/³ x 12¹/³ = 2ᵃ x 3ᵇ Pls give me correct answers to all thanks.

Answer 1

Answer:

answer for the given problem is given

Answer 2

Answer:

5.1013 * 10^14

Step-by-step explanation:

4*3.142 * (6.371*10)

4*3.142 * 40.5896 * 10^12

510.13009 * 10^12

5.1013 * 10^14

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