Not sure how to solve this and I need an answer quick!

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

What happens to the area as the sliders are adjusted? what do you think the formula for the area of a triangle is divided by 2?

Adam used 1072.4 gallons of water over the course of 7 days. how much water did adam use, on average, each day?