0.5 +6.38 = 6.9 because 0.5 is precise to the tenth digit, so the answer must
also be rounded to the nearest tenth.

A. True
B. False

True-  because 0.5 isnt written as 0.50 because its been simplified so the answer should be too and to simplify the answer 6.88 would be to round it to 6.9.

Explanation:

#1  sara was always tasked with selecting birthday presents for her friends and family because everyone admired her  impeccable taste. 

impeccable (adj): perfect, flawless

#2  they moved to the united states many years ago, but their  insular  attitudes made it difficult for them to socialize. 

insular (adj): isolated; separate

#3  the professor explained the  semantic  relationship between the two nouns used in the sentence. 

semantic (adj): related to words or the meanings of words 

happy to : )