Question: How many 3-digit area codes can be made from the digits zero through nine if the 1st digit is not allowed to be a zero

How many 3-digit area codes can be made from the digits zero through nine if the 1st digit is not allowed to be a zero and the digits are allowed to repeat?

The college soccer team will play 11 games next fall. Each game can result in one of the three outcomes: a win, a loss, or a tie. Find the total possible number of outcomes for the season record.

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How many 3-digit area codes can be made from the digits zero through nine? Assume that the digits may repeat and that area codes beginning with zero are allowed.

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