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Artist 52 [7]
3 years ago
6

Consider a refrigerator that consumes 320 W of elec- tric power when it is running. If the refrigerator runs only one quarter of

the time and the unit cost of electricity is
Mathematics
1 answer:
irinina [24]3 years ago
3 0

Answer: The refrigerator cost in this month is $4.5 approximately.

Step-by-step explanation:

Since we have given that

Amount of watt of electric power = 320 W

Number of days = 30

Unit cost of electricity = $0.13/Kwh

Hold factor = \dfrac{1}{4}

Number of hours in a month = 24

So, the refrigerator cost in this month would be

0.13\times 0.32\times \dfrac{1}{4}\times 30\times 24\\\\=\$7.488

Hence, the refrigerator cost in this month is $4.5 approximately.

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Answer:

\boxed{\sf all \ real \ numbers \ greater \ than \ or \ equal \ to \ 0}

Step-by-step explanation:

The domain of a function is all possible values for x.

\sf f(x)=\frac{2}{5} \sqrt{x}

There are restrictions on x.

The square root of a number can be undefined if that number is less than 0.

The value of x is all real numbers greater than or equal to 0.

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3 years ago
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Help me someone please my teacher needs this soon or I’m going to fail school
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Answer:

  • A. 9π/3 · 2

Step-by-step explanation:

<u>Use the equation of circumference and substitute the value of radius:</u>

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<u>Compare the answer choices to find the correct one, which is:</u>

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PLEASE HELP ME!!! GEOMETRY!<br> Please help me find the proofs that I would use in parts a and b.
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a) substitution   (refer to statements 1 and 2)

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3 years ago
6 girls share 4 brownies equally. What fraction of the brownies does each friend get?
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Answer:

2/3

Step-by-step explanation:

You have 6 friends who want to share 4 brownies equally. You simply divide the 4 brownies by 6 people:

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2 years ago
Question 1 WRONG With what number must 3.475817 be multiplied in order to obtain the number 34,758.17? A 100 1,000 10,000 D 100,
lbvjy [14]

Answer:

1 - Option C - 10,000

2 - 3x+5 will be 12 more than 3x-7.

Step-by-step explanation:

1) To find : With what number must 3.475817 be multiplied in order to obtain the number 34,758.17?

Solution :

The number 3.475817 is multiplied by number to obtain 34,758.17.

As we see that, the decimal is moved four places to the right.

Which means the number is multiplied by 10000.

i.e. 3.475817\times 10000=34,758.17

Therefore, option C is correct.

2) To find : How much greater is the value of 3x+5 than the value of 3x−7?

Solution ;

Assuming that x is the same value in each equation,

In order to determine the difference between the two values,

We ignore the 3x part as it is the same on both of the equations.

So, from 5 to -7 i.e. 7+5=12.

Therefore, 3x+5 will be 12 more than 3x-7.

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