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Oksanka [162]
3 years ago
9

5) Telephone numbers in the

Mathematics
1 answer:
rodikova [14]3 years ago
3 0

Answer:

6,400,000,000 (6.4 billions)

Step-by-step explanation:

We have a total of 10 digits, and each digit was 10 possibilities of being filled, except the first digit of the area code and first digit of the telephone number, that have only 8 possibilities.

So if 8 digits have 10 possible values and 2 digit has 8 possible values, the number of possible telephone numbers is:

10^8 * 8^2 = 6,400,000,000 (6.4 billions)

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Answer:5.86 9.26

Step-by-step explanation:

5 0
3 years ago
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What is the axis of symmetry of h(x)= 5x^2+40x+ 64?
andrezito [222]

Answer:

Axis of symmetry is  x = -4

Step-by-step explanation:

h(x)= 5x^2+40x+ 64

Use the formula for axis of symmetry:   x = -b/(2a)

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so

x = -40/(2*5) = -40/10 = -4

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3 years ago
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Which quantity is proportional to 6⁄4?
SIZIF [17.4K]

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Step-by-step explanation:

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6 0
3 years ago
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15 less than quadruple a number w​
vichka [17]

Answer:

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Step-by-step explanation:

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8 0
2 years ago
A. 37<br> B. 38<br> C. 39<br> D. 40
Dvinal [7]

Hello ^w^

I believe the answer you are looking for is A

I found this answer by adding up the lengths of all the sides.

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S -> R = 7

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10 + 6 + 6 + 7 + 8 ->  37

A -> 37

If I am incorrect, please inform me.

Have a good day!

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