To divide the numbers in scientific notation \((1.9 \times 10^8)\) and \((2 \times 10^3)\), you can follow these steps:
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Divide the coefficients: \[ \frac{1.9}{2} = 0.95 \]
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Subtract the exponents: \[ 10^{8 - 3} = 10^5 \]
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Combine the results: \[ 0.95 \times 10^5 \]
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Convert to proper scientific notation: Since scientific notation requires the coefficient to be between 1 and 10, we convert \(0.95\) to \(9.5\) by multiplying it by \(10^{-1}\). \[ 0.95 \times 10^5 = 9.5 \times 10^{-1} \times 10^5 \]
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Combine the exponents: \[ 9.5 \times 10^{5 - 1} = 9.5 \times 10^4 \]
Thus, the final result in scientific notation is: \[ \boxed{9.5 \times 10^4} \]