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.
Depends on how large the track is. If the track is a mile and a half it could take 235 laps. The best way to find out is to know how far the race is 500 or 400 miles, and divi â¦ de by the size of the track.