Question

The planet Neptune orbits the Sun. Its orbital radius is 30.130.130, point, 1 astronomical units (\text{AU})(AU)left parenthesis, start text, A, U, end text, right parenthesis.
Assuming Neptune's orbit is circular, what is the distance it travels in a single orbit around the Sun?
Give your answer in terms of \piπpi.

Answer 1

Answer:

Answer:

The distance Neptune travels in a single orbit is .

Step-by-step explanation:

The distance that Neptune travels in a single orbit is the circumference of it's orbit.

The circumference  of any circle of radius  is

.

Therefore, the circumference of Neptune's orbit, which has a radius of 30.12 AU, is

Or, in Kilometers this is

                     

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Answer 2

Answer:

The distance Neptune travels in a single orbit is $60.26\pi AU$.

Step-by-step explanation:

The distance that Neptune travels in a single orbit is the circumference of it's orbit.

The circumference $c$ of any circle of radius $r$ is

$c = 2\pi r$.

Therefore, the circumference of Neptune's orbit, which has a radius of 30.12 AU, is

$c = 2\pi (30.13AU )$

$\boxed{c = 60.26\pi\: AU }$

Or, in Kilometers this is

$c = 9.0*10^9 \pi \: km.$                      $(1 AU = 1.5*10^8km)$