Question

measured value 28.7053 cm, which has six significant figures.round the measurement to two significant figures.
a. 29 cm
b 28.7 cm
c 30 cm
d 28.71 cm

Explanation:

Step1: Identify first two sig - figs

The first two significant figures of 28.7053 are 28.

Step2: Look at next digit

The digit after 8 is 7. Since 7 ≥ 5, we round up.

Step3: Round the number

28 rounds up to 29.

Answer:

A. 29 cm