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pentagon [3]
3 years ago
11

How many phone numbers (without area codes) are possible? The first digit cannot be 0 or 1.

Mathematics
1 answer:
siniylev [52]3 years ago
7 0

Answer:

Step-by-step explanation:

For the first digit, there are 8 numbers to choose from (2, 3, ..., 9).

For each remaining digits, there are 10 numbers to choose from (0, 1, ..., 9).

Choose 6 of them. Repetition is allowed, and order matters.

There are 10⁶ possible choices.

There are 8×10⁶ possible phone numbers.

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F(x) = 8 - 3x

f(9) = 8 - 3(9)
= 8 - 27
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Step-by-step explanation:

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AleksandrR [38]

Answer:

Results are below.

Step-by-step explanation:

Giving the following information:

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At an annual rate of 5% compounded annually, she should choose the five installments instead of the $255,000.

<u>Now, if the annual rate is 6% continuously compounded.</u>

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A

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Answer 3x3.4

Step-by-step explanation:

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