A small town's phone numbers either begin 373 or 377. How many phone numbers are available?

Mathematics

1 answer:

ser-zykov [4K]3 years ago

6 0

Answer:

There are 20,000 number available.

Explanation:

To determine how many phone numbers are available you need to know how many digits the number contains.

I will assume the same number of digits for other similar questions, i.e. 7.

With 7 digits, the numbers that begin with 373 or 377 can be of the form 373XXXX or 377XXXX.

Where each X can be any digit 0 - 9. Then, there are 10 different options for each X.

Thus, there are 10×10×10×10 = 10,000 different numbers starting with 373 and other 10,000 different numbers starting with 377.

In total, there are 20,000 numbers available.

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Answer:

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Symbol: →

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We can rewrite this in a standard form of the conditional operator, that is:

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Case 2.

According to the problem we have:

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Case 3.

According to the problem we have:

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A: You do not win the championship match.
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We can write this in a conditional statement:

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Case 4.

According to the problem we have:

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We can rewrite this in a conditional statement:

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We can write this in a conditional statement:

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Hypothesis: You will not receive the trophy
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Fudgin [204]

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log x to the base b = (log x)/(log b) to a new base

∴ log₄(x+3) = log (x+3) / log 4
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∴ the correct answer is number one

See the attached figure.