Solve 2/3x= 20
Please help i’ll give 30 points for it

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

Which expression is equivalent to7_/x^2 ÷ 5_/y^3? assume y# 0

Abacteria population is tripling every hour. by what factor does the population change in 1/2 hour? select all that apply