Question 2
Fractions, Decimals and ApproximationEvaluate 64.7642 − 35.2362 correct to 3 significant figures.
- A.2960
- B.2950
- C.2860
- D.2850
Show the answer and explanation
Answer: B (2950)
Explanation
Use the difference of two squares: (64.764 − 35.236)(64.764 + 35.236) = 29.528 × 100 = 2952.8, which is 2950 to 3 significant figures.