While the earth's orbit (path) about the sun is slightly elliptical, it

can be approximated by a circle with a radius of 93,000,000 miles.

a) How far does the earth travel in one orbit about the

sun? That is, what is the approximate circumference of the earth's path?

b) Approximately how fast is the earth traveling in its orbit in space? Calculate

your answer in miles per hour.

The circumference = 186000000π miles and the speed or the earth is 7750000π miles per hour.

Step-by-step explanation:

Radius (r) = 93000000 miles

a) circumference = 2πr

= 2π (93000000) miles

= 186000000π miles

b) speed = distance / time

Here distance is the circumference and time is 24hrs because if the earth completes 1 revolution around the sun in 24hrs.

Speed = 186000000π/24

= 7750000π miles per hour