Question

What is the answer please

Answer 1

≈ 20

Explanation:

2.65 ≈ 3 ( to 1 significant figure )

4.1758 ≈ 4 ( to 1 significant figure )

7.917 ≈ 8 ( to 1 significant figure )

Then approximate calculation is

3 × 4 + 8 = 12 + 8 = 20