Question

Please help with Part A and B. Thank you.

Answer 1

Hello!

Part A:
The equation for a circle is (x - a)^2 + (y - b)^2 = r^2

We can say that the center of the earth is point (0, 0)

This gives us the equation

x^2 + y^2 = 3960^2

Square the number

x^2 + y^2 = 15681600

The answer is C
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Part B

The answer is C) 69 miles

Hope this helps!