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3 years ago

A seven-digit phone number in the united states consists of a three-digit exchange followed by a four-digit number.

1 answer:

7 0

10 total numbers can be used for each digit ( 0-9) except the first digit:

1st digit can be 1 of 9 numbers
other 6 digits can be 1 of 10 numbers each

multiply all the possible numbers together:

9 x 10 x 10 x 10 x 10 x 10 x 10 = 9,000,000 possible phone numbers

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Convert 1/15 into a decimal correct to 2 decimal places

Citrus2011 [14]

Answer:

$\frac{1}{15} = 0.\overline{66}$

Step-by-step explanation:

We proceed to show the procedure to calculate the given fraction into a decimal form:

1) Since numerator is less than denominator, the integer component of the decimal number is zero:

$\frac{1}{15} = 0.xx$

2) We multiply the numerator by 10 and find the tenth digit:

$\frac{10}{15} = 0$

Then,

$\frac{1}{15} = 0.0xx$

3) We multiply the fraction in 2) by 10 and find the hundredth digit:

$\frac{100}{15} = 6$

Then,

$\frac{1}{15} = 0.66x$

And the remainder is:

$r = 100-15\times 6$

$r = 10$

4) We multiply the remainder by 10 and divide this result by the denominator to determine the thousandth digit:

$\frac{100}{15} = 6$

Then,

$\frac{1}{15} = 0.666$

This question asks us to write a decimal correct to 2 decimal places, which has the characteristic that is infinite periodical decimal. Then, the result correct to 2 decimal places is:

$\frac{1}{15} = 0.\overline{66}$

3 0

3 years ago

What is the answer of this? thanks. 15 pts

Vikentia [17]

3.(6^(12-10)) = 3× 6^2 =3× 36 =108

5 0

4 years ago

Read 2 more answers

Solve the equation for x. show each step of the solution. name the justifications for each step of the solutions.

sweet [91]

9/2{8-x}+36=102-5/2{3x+24}
you first use 9/2 to open brackets
9/2*8=36,
9/2*x=9/2x
36-9/2x=102-5/2{3x+24}
5/2*3x=15/2x+60
36-9/2x=-15/2x-60
36+60=15/2x+9/2x
96=12x you then divide and the answer obtained will be 8.
x=8

5 0

3 years ago

Harriet used the work below to determine the percent equivalent to One-eighth.

lbvjy [14]

Answer:

Step-by-step explanation:

6 0

3 years ago

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Which is the best estimate?

kotegsom [21]

7.5 bbbbbbbbbbbbbbbbbb