Question

Write 168.9 correct to 2 significant figures.

Answer 1

170

Explanation:

168.9 is between 160 and 170 ← both to 2 significant figures.

However 168.9 is nearer to 170 than 160, hence

168.9 ≈ 170 ( to 2 significant figures )

Answer 2

190

Explanation:

This rounds to 190 as it goes upwards

0 is not a significant figure unless it is between 2 significant figures

THEREFORE ITS 190