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Which expressions are equivalent to 72767^{-2} \cdot 7^{6} ?\newlineChoose 11 answer:\newline(A) 7272\frac{7^{2}}{7^{-2}}\newline(B) 7672\frac{7^{6}}{7^{-2}}\newline(C) 7127^{-12}\newline(D) (72)2(7^{2})^{2}

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Q. Which expressions are equivalent to 72767^{-2} \cdot 7^{6} ?\newlineChoose 11 answer:\newline(A) 7272\frac{7^{2}}{7^{-2}}\newline(B) 7672\frac{7^{6}}{7^{-2}}\newline(C) 7127^{-12}\newline(D) (72)2(7^{2})^{2}
  1. Apply exponent rule for multiplying powers: Apply the exponent rule for multiplying powers with the same base.\newlineWhen multiplying powers with the same base, you add the exponents.\newline72×76=72+67^{-2} \times 7^{6} = 7^{-2 + 6}\newlineCalculate the sum of the exponents.\newline2+6=4-2 + 6 = 4\newlineSo, 72×76=747^{-2} \times 7^{6} = 7^{4}
  2. Calculate sum of exponents: Check each answer choice to see if it simplifies to 747^{4}.
    A) (72)/(72)(7^{2})/(7^{-2})
    Apply the exponent rule for dividing powers with the same base.
    When dividing powers with the same base, you subtract the exponents.
    (72)/(72)=72(2)(7^{2})/(7^{-2}) = 7^{2 - (-2)}
    Calculate the difference of the exponents.
    2(2)=2+2=42 - (-2) = 2 + 2 = 4
    So, (72)/(72)=74(7^{2})/(7^{-2}) = 7^{4}
  3. Check answer choice A: Check the next answer choice.\newlineB) (76)/(72)(7^{6})/(7^{-2})\newlineApply the exponent rule for dividing powers with the same base.\newline(76)/(72)=76(2)(7^{6})/(7^{-2}) = 7^{6 - (-2)}\newlineCalculate the difference of the exponents.\newline6(2)=6+2=86 - (-2) = 6 + 2 = 8\newlineSo, (76)/(72)=78(7^{6})/(7^{-2}) = 7^{8}\newlineThis is not equivalent to 747^{4}.
  4. Check answer choice B: Check the next answer choice.\newlineC) 7(12)7^{(-12)}\newlineThis is simply a power of 77 with an exponent of 12-12.\newlineThere is no need to apply any exponent rules here.\newline7(12)7^{(-12)} is not equivalent to 747^{4} because the exponents are different.
  5. Check answer choice C: Check the last answer choice.\newlineD) (72)2(7^{2})^{2}\newlineApply the exponent rule for raising a power to a power.\newlineWhen raising a power to a power, you multiply the exponents.\newline(72)2=72×2(7^{2})^{2} = 7^{2 \times 2}\newlineCalculate the product of the exponents.\newline2×2=42 \times 2 = 4\newlineSo, (72)2=74(7^{2})^{2} = 7^{4}

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