# Problem 2-1(c) Average Speed - (a)

Determine the average speed in metres per second. Express the final answer in scientific notation using the correct number of significant digits.
(C) The moon takes $27.3$ days to complete one orbit around the earth. The average earth-moon distance is $\mathrm{3.84 \times 10^5\; km.}$

Correct!

The average distance from the earth to the moon is the radius of the orbit.

The distance the earth travels in completing one orbit is:

(A)  The radius of the orbit.

(B)  The diameter of the orbit.

(C)  The circumference of the orbit.