Ihave 8 question on round to the place valve of the underline digit

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

He concluded that a heavier object dropped from the same height as a lighter object will land

52 cm radius = diameter = area = circumference = circumfer