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Subtract. Write your answer in scientific notation.\newline(6.9×109)−(3.89×109)(6.9 \times 10^9) - (3.89 \times 10^9)\newlineChoices:\newline(A) 3.01×1093.01 \times 10^9\newline(B) 3.01×10103.01 \times 10^{10}\newline(C) 2.684×1092.684 \times 10^9\newline(D) 2.684×10102.684 \times 10^{10}

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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(6.9×109)−(3.89×109)(6.9 \times 10^9) - (3.89 \times 10^9)\newlineChoices:\newline(A) 3.01×1093.01 \times 10^9\newline(B) 3.01×10103.01 \times 10^{10}\newline(C) 2.684×1092.684 \times 10^9\newline(D) 2.684×10102.684 \times 10^{10}
  1. Calculate Coefficients: We have: \newline(6.9×109)−(3.89×109)(6.9 \times 10^9) - (3.89 \times 10^9)\newlineSince the powers of 1010 are the same, we can subtract the coefficients directly.\newlineWhat is 6.9−3.896.9 - 3.89?\newline6.9−3.89=3.016.9 - 3.89 = 3.01
  2. Convert to Scientific Notation: Write the answer in scientific notation.\newlineSubstitute 3.013.01 for the coefficient aa and 99 for the exponent bb in a×10ba \times 10^b.\newlineScientific notation: 3.01×1093.01 \times 10^9
  3. Find Equivalent Expression: Choose the equivalent expression for (6.9×109)−(3.89×109)(6.9 \times 10^9) - (3.89 \times 10^9).(6.9×109)−(3.89×109)=3.01×109(6.9 \times 10^9) - (3.89 \times 10^9) = 3.01 \times 10^9(6.9×109)−(3.89×109)(6.9 \times 10^9) - (3.89 \times 10^9) is equivalent to 3.01×1093.01 \times 10^9.

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