To solve the multiplication \( 8.89 \times 1.3886 \times 1.50 \):
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Calculate the product using a calculator: \[ 8.89 \times 1.3886 \times 1.50 = 18.511487 \]
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Now, determine the correct significant digits:
- \( 8.89 \) has 3 significant figures.
- \( 1.3886 \) has 5 significant figures.
- \( 1.50 \) has 3 significant figures.
The final result must be rounded to the least number of significant figures in the original numbers, which is 3 significant figures (from \( 8.89 \) and \( 1.50 \)).
The value \( 18.511487 \) rounded to 3 significant figures is 18.5.
Thus, the answers are:
- A. \( 18.511487 \) (calculator answer)
- B. \( 18.5 \) (correct significant digit answer)