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In the city of Lawrenceville, how many phone numbers are possible using the area code 678? The restrictions for the phone company are listed below. Β· The first digit of the phone number cannot be numbers 0-5. Β· The second number cannot be a zero. Β· The third and fourth numbers cannot be a zero or one Β· The fifth number cannot be a zero, one or two How many phone numbers are possible using the area code 678? a.2000 b.1,6128 c.1,612,800 d.300

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Answer:

Hey there!

If there were no restrictions, there would be 10x10x10x10x10 phone numbers.

The first number can only be a 6-9, so that is four options.

The second number can have nine options.

The third and fourth numbers have eight options.

The fifth number has seven options

4x9x8x8x7=16128.

16128 numbers are possible.

Let me know if this helps :)

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