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If (10000x = 0.5625), what is the value of (x)?

Answer and explanation

Correct answer: 0.00005625

The governing algebraic idea is to isolate the variable by performing the inverse operation on both sides. Since 10000 is multiplying x, divide both sides by 10000: x = 0.5625/10000. Dividing by 10,000 moves the decimal point four places to the left. Starting with 0.5625, the successive shifts give 0.05625, 0.005625, 0.0005625, and finally 0.00005625. Hence x = 0.00005625, so option C is correct. Option A ignores the division, option B shifts the decimal only three places, and option D shifts it only two places. Substitution confirms the result because 10,000 × 0.00005625 = 0.5625.

Related tags

Number SystemsDecimal RepresentationDecimal DivisionMathematicsClass 9 Mcq

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