WAEC - Mathematics (2021 - No. 1)

correct 0.007985 to three significant figures.
0.0109
0.0800
0.00799
0.008

Explanation

  1. To round to three significant figures, look at the fourth significant figure. It's a 5 , so round up or round down if below 5.
  2. To round to two significant figures, look at the third significant figure. It's an 8 , so round up.

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