WAEC Computer Studies 2019 Paper

Concept:A slide rule uses logarithmic scales, so its precision is limited by the scale markings and the user’s ability to read them.Explanation:The slide rule performs calculations by adding or subtracting logarithms represented as physical distances on its scales.These distances are read by eye, so the result cannot be extremely precise.A standard slide rule is usually accurate to about 3 significant figures.This corresponds to roughly 3 to 4 decimal places in typical computed answers.Accuracy of 5 or 6 decimal places is not possible with an analog slide rule.Answer:B. 3-4 decimal places.