Aregular mile an hour is 5,280 feet per hour. a knot is

For the rule of 78, for a 12-month period, the last term in the sequence is 12 and the series sums to 78. for an 10 month period, the last term is and the series sum is . for a 15 month period, the last term is and the series sum is . for a 20 month period, the last term is and the series sum is

The sum of the reciprocal of a positive number and the reciprocal of 2 more than the number is 3/4 equation: the number is

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