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How many ten-digit telephone numbers

can someone correct this for me parts A-E and if i am wrong can you help me....pleaseHow many 7-digit telephone numbers are
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2. asked by student
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How many international direct-dialing numbers are possible if each number consists of a four-digit area code (the first digit of
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2. asked by Kal Jay
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From the digits 1, 2, 3, and 4, how many positive integers are less than 100,000? Consider the possibilities for 5-digit,
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2. asked by Sebastian
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Telephone numbers are made of 7 digits. Digits can be repeated but the first digit cannot be 0 or 1. How many different
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2. asked by John
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How many different seven-digit telephone numbers are available if the only restriction is that the first digit can't be 0? Is
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2. asked by Thea
3. 564 views
The local seven-digit telephone numbers In a city have 617 as the first three digits. How many different telephone numbers are
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2. asked by Brendon
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how many 7 digit telephone numbers can be made if every other digit is even
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2. asked by jenny
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The last part of a telephone number has four digits, e.g. 7814 1487 2103 2772The last part of the telephone number can start
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2. asked by Abbie
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The last part of a telephone number has four digits, e.g.7814 1487 2103 2772 The last part of the telephone number can start
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2. asked by vaNI
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In the state of Georgia, telephone numbers consists of 10 digits, including the area code. One of these area codes is 770. The
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2. asked by Anonymous
3. 630 views