From the start, Fox News reports that Bolt reaches a speed of 28 mph. Bolt covered the course from a standing start at 23.35 miles per hour. However, he dashed from the 60m to the 80m mark in 1.61 seconds, approximately 27.79 mph. If he could maintain that speed over the whole 100m, with a flying start, he would record a time of 8.05 seconds.
The phone number (888) 817-2153 is indeed a telephone number for the U.S. Census Bureau of the U.S. Department of Commerce. The number will reach one of their telephone facilities in Hagerstown, MD, Jeffersonville, IN, or Tucson, AZ.
Finding Census tract numbers can be difficult and time consuming. Many times, researchers will refer to a Census tract as Census Tract 7 or Census Tract 9.01. But Census Tract 7 or 9.01 doesn't uniquely identify the Census tract; in fact, there are hundreds of Census Tract 7s in the United States. A Census tract is uniquely identified by using its complete 11 digit Census tract number.