DNA analysis is the process in which genetic sequences are studied. It is used by law enforcement and medical personnel to identify a particular person or species, and even specific cancers and diseases. At one point the analysis process was very limited.
To round off to the nearest tenth, means to keep one decimal digit. (To round off to the nearest hundredth would mean to keep two digits; to the nearest thousandth, three; and so on. Now, the digit in the second decimal place is 5. Therefore add 1 to the previous digit 2.
27.17469 rounded to the nearest whole number is 27. 36.74691 rounded to the nearest whole number is 37. 12.34690 rounded to the nearest tenth is 12.3. 89.46917 rounded to the nearest tenth is 89.5. 50.02139 rounded to the nearest hundredth is 50.02. 72.63539 rounded to the nearest hundredth is 72.64.