I really need help with Linear equations in general.

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

Ineed to know the ordered pairs for this equation i need the answer quick because it’s a timed test

Simplify. 3(4+4x) (type your answer in with no spaces)