Mach is a measure of the ratio of the velocity of an object, in this case a plane, to the velocity of sound, which equals Mach 1, or 761.2 miles per hour.

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The amount of pizza that Pizza Hut expects to sell equals 23 million feet of pizza, or enough pizza to cross the Golden Gate Bridge more than 1, 200 times.

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Nationally, Martha Stewart Living's ratings in February dropped to a ho-hum 1.5 (one rating point equals almost 1 million TV households), down from 2.4 two years ago.

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If the distribution equals the total of qualified education expenses, then none of the amounts in boxes 1-3 need to be reported on your tax return.

FORBES: Taxes From A To Z (2013): Q Is For Form 1099-Q