Question

Please help I will give out brainliest and 100 points

Answer 1

Answer:

20.5 cm

21.5 cm

Step-by-step explanation:

Length is 21 cm correct to 2 significant figures

Find lower and upper bounds

• The lower bound is the smallest value that will round up to the approximate value.
• The upper bound is the smallest value that will round up to the next approximate value.

As per above definition:

• Lower bound is 20.5 cm rounded to 21
• Upper bound is 21.5 cm rounded to 22

Answer 2

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