Seudónimo Seudónimo
  • 31-08-2020
  • Mathematics
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Please help i will give out brainliest

Please help i will give out brainliest class=

Respuesta :

ricchad
ricchad ricchad
  • 31-08-2020

Answer:

a.  L.B. = 20.5

b.  U.B. = 21.5

Step-by-step explanation:

Length is measured 21 cm correct to 2 significant figures

a.  Lower bound of 21

   =  20.5 < 21

   = 20.5

b. Upper bound of 21

    = 21 < 21.5

    = 21.5

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