Concept:An "off the scale" multiplication result on a slide rule cannot be corrected by resetting the rule, because resetting only starts a fresh calculation.
Explanation:To multiply on a slide rule, you align the index of the
C scale with the first number on the
D scale.
Then you read the product on the
C scale.
Sometimes the product falls beyond the marked end of the
D scale, so it is said to be "off the scale."
Circular slide rules prevent this because their scales have no end.
Folded scales also help because they extend the readable range.
Flat scales provide another way to read values that would otherwise run off the ordinary scale.
Resetting the slide does not bring an off-scale product back onto the scale.
It simply returns the slide to its starting position.
Therefore, resetting the slide is not a method of correcting the problem.
Answer:A. resetting the slide.