If the distance between gridlines represents 50 years, how many such intervals are needed to span 100 years?

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Multiple Choice

If the distance between gridlines represents 50 years, how many such intervals are needed to span 100 years?

Explanation:
Each gridline interval represents a 50-year span. To cover 100 years, you need twice as many of these intervals as one interval provides, since 100 is two times 50. So you fit two gridline intervals into the 100-year span. The correct option is the one that corresponds to two intervals.

Each gridline interval represents a 50-year span. To cover 100 years, you need twice as many of these intervals as one interval provides, since 100 is two times 50. So you fit two gridline intervals into the 100-year span. The correct option is the one that corresponds to two intervals.

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