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MATHEMATICS

JAMB 2007 - Question 30

Mathematics 2007 JAMB Past Questions - Question 30: Evaluate (0.5625)² - (0.4375)² /0.04 correct to 3 significant figures

Evaluate (0.5625)² - (0.4375)² /0.04 correct to 3 significant figures

A: 3.11

B: 3.13

C: 0.313

D: 3.12

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Correct Answer

Explanation

(0.5625)² - (0.4375)² /0.04 = 0.3164.63 – 0.1914.63/0.04= 0.125/0.04 = 3.125 = 3.13(3 s.f)To evaluate the expression (0.5625)² - (0.4375)² / 0.04, we can perform the necessary calculations and round the result to 3 significant figures.(0.5625)² - (0.4375)² / 0.04 = 0.31640625 - 0.19140625 / 0.04 = 0.125 / 0.04 = 3.125Rounding the result to 3 significant figures, we get:3.125 ≈ 3.13Therefore, the evaluated expression is approximately 3.13.