Find the number and list them in order, starting with the smallest. please help!​

Fiona races bmx around a circular dirt course. if the radius of the course is 70 meters, what is the total distance fiona covers in two laps of the race? a. about 30,772 meters b. about 15,386 meters c. about 879.2 meters d. about 439.6 meters e. about 219.8 meters23 points hurry

Just tell me how to set up the equation.

Define multiplicative inverse. give an example of a number and its multiplicative inverse.