Find the product 5/12 and 3/8. express to simplest form

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 shows the correct solution of the equation 1/2a+2/3b=50, when b=30?

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much