Respuesta :

sqdancefan

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Answer:

  E)  5.7

Step-by-step explanation:

The applicable geometric mean rule tells you ...

  SQ² = SR·ST

  ST = SQ²/SR = 27²/30 = 24.3

Then the measure of RT is ...

  RT = SR -ST = 30 -24.3

  RT = 5.7