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A lecture period (50 min) is close to 1 ...

A lecture period (50 min) is close to 1 microcentury.
(a) How long is a microcentury in minutes? (b) Using percentage difference = `("actual - approximation")/("actual")100`,
find the percentage difference from the approximation.

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(a) 52.6 min, (b) 4.9%
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