âThereâs called free circulating DNA, the fetus, some of its DNA gets into the maternal blood and we can actually detect that DNA -- the accuracy of these tests are about 99 percent,â Dr. Abdullah said, âWe can do this test around 10 weeks, so itâs very early in the pregnancy.â.
Daytona International Speedway is 2.5 miles (4 km) long and a 500-mile race requires 200 laps to complete. However, the race is considered official after half its distance (100 laps or 250 miles (400 km)) has been completed.
Best Answer: Four laps equals one mile on the track. (1600) Two laps is a half mile. (800m) The track is divided into four 100m parts for it to equal one lap. Therefore, 400m equals one lap. Also, usually on a high school track, there are 6 lanes. I hope I didn't confuse you.