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.
Since it is common practice that amateur runners are allowed to run in lanes four through eight it can be seen that they are running a greater distance than 400 meters per lap. Four times around the track in lane four is almost 1700 meters, 100 meters more than the distance in lane one. While a runner utilizing lane eight for four laps will run almost 1815 meters or 215 meters further than they would if they ran in lane one.