3 years ago

Please help i will give out brainliest

Mathematics

1 answer:

Aleksandr-060686 [28]3 years ago

4 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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