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Subtract. Write your answer in scientific notation.\newline(9×105)−(7.7×105)(9 \times 10^5) - (7.7 \times 10^5)\newlineChoices:\newline(A) 1.3×1051.3 \times 10^5\newline(B) 1.3×1001.3 \times 10^0\newline(C) 5.4×1055.4 \times 10^5\newline(D) 5.4×1005.4 \times 10^0

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Add and subtract numbers written in scientific notationright chevron icon

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Q. Subtract. Write your answer in scientific notation.\newline(9×105)−(7.7×105)(9 \times 10^5) - (7.7 \times 10^5)\newlineChoices:\newline(A) 1.3×1051.3 \times 10^5\newline(B) 1.3×1001.3 \times 10^0\newline(C) 5.4×1055.4 \times 10^5\newline(D) 5.4×1005.4 \times 10^0
  1. Identify Subtraction Problem: We have the following subtraction problem:\newline(9×105)−(7.7×105)(9 \times 10^5) - (7.7 \times 10^5)\newlineSince the powers of 1010 are the same, we can subtract the coefficients directly.\newlineWhat is 9−7.79 - 7.7?\newline9−7.7=1.39 - 7.7 = 1.3
  2. Perform Subtraction: Write the answer in scientific notation.\newlineSince we have subtracted the coefficients, we keep the power of 1010 the same.\newlineScientific notation: 1.3×1051.3 \times 10^5
  3. Write in Scientific Notation: Choose the equivalent expression for (9×105)−(7.7×105)(9 \times 10^5) - (7.7 \times 10^5).(9×105)−(7.7×105)=1.3×105(9 \times 10^5) - (7.7 \times 10^5) = 1.3 \times 10^5 The correct choice is (A) 1.3×1051.3 \times 10^5.

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