To calculate \( 8% \) of \( 5 \times 10^3 \), follow these steps:
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First, calculate \( 5 \times 10^3 \): \[ 5 \times 10^3 = 5 \times 1000 = 5000 \]
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Next, find \( 8% \) of \( 5000 \): \[ 8% = \frac{8}{100} = 0.08 \] Now calculate \( 0.08 \times 5000 \): \[ 0.08 \times 5000 = 400 \]
Therefore, \( 8% \) of \( 5 \times 10^3 \) is \( \boxed{400} \).