The global spending on travel and tourism (in billions of dollars) can be described by the equation

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The global spending on travel and tourism (in billions of dollars) can be described by the equation

y = 1.48x2 – 25.23x + 416.91

where x equals the number of years past 1990 (Source: World Tourism Organization). Find the year after 1990 in which spending is projected to reach $1968 billion.

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