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If (10^m · 100^2 / 1000 = 10^6), what is the value of (m)?

Answer and explanation

Correct answer: 5

The governing concept is converting every number to a power of the same base and then applying exponent laws. Since 100=10², we obtain 100²=(10²)²=10⁴. Also, 1000=10³. Therefore the left-hand side becomes 10^m×10⁴/10³=10^(m+4−3)=10^(m+1). The equation is consequently 10^(m+1)=10⁶. Because the base 10 is positive and different from 1, equal powers have equal exponents, so m+1=6 and m=5. Hence option C is correct. The other choices can result from forgetting to square 100, adding rather than subtracting the denominator exponent, or simply copying the final exponent without simplifying the other factors.

Related tags

Powers-Of-TenExponent-LawsAlgebraic-SimplificationOperations On Real Numbers And The Laws Of ExponentsPolynomialsMathematicsClass 10 Mcq

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