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o-na [289]
4 years ago
11

Please help I will give out brainliest

Mathematics
1 answer:
Ipatiy [6.2K]4 years ago
7 0

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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