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Bezzdna [24]
3 years ago
14

Last month Marybeth was charged $112for a 945kWh of electricity. How much did the company charger her per kWh, to the nearest ce

nt
Mathematics
2 answers:
professor190 [17]3 years ago
7 0

Answer:

$0.12

Step-by-step explanation:

We have been given that last month Marybeth was charged $112 for a 945 kWh of electricity. We are asked to find the charges of per kWh.

To find charges of per kWh, we will divide $112 by 945 kWh.

\text{Charges of per kWh of electricity}=\frac{\$112}{\text{945 kWh}}

\text{Charges of per kWh of electricity}=\frac{\$0.1185185}{\text{kWh}}

Upon rounding our answer to nearest hundredth we will get,

\text{Charges of per kWh of electricity}\approx \frac{\$0.12}{\text{kWh}}

Therefore, the company charges $0.12 per kWh of electricity.

Usimov [2.4K]3 years ago
3 0
She was charged 12 cents per kWh
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PLEASE HELP/ANSWER! From 1980 to 1990, Lior’s weight increased by 25%. If his weight was k kilograms in 1990, what was it in 198
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The weight in 1980 is \frac{4k}{5} kilograms

<em><u>Solution:</u></em>

From 1980 to 1990, Lior’s weight increased by 25%

His weight is "k" kilograms in 1990

<em><u>To find: weight in 1980</u></em>

This is a percentage increase problem

Let "x" be the weight in kilograms in 1980

<em><u>The percentage increase is given by formula:</u></em>

\text{Percentage increase } = \frac{\text{Final value - initial value}}{\text{initial value}} \times 100

Here,

Initial value in 1980 = x

Final value in 1990 = k

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<em><u>Substituting the values in formula,</u></em>

25 = \frac{k-x}{x} \times 100\\\\25x = 100(k-x)\\\\x = 4(k-x)\\\\x = 4k - 4x\\\\5x = 4k\\\\x = \frac{4k}{5}

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Clara wants to cover the top of her jewelry box. The top of the box is a rectangle with a length of 9.4 cm and a width of 8.3 cm
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Answer: 78.02 cm²


Step-by-step explanation:

1. To solve this problem you need to apply the formula for calculate the area of a rectangle, which is shown below:

A=l*w

Where A is the area of the rectangle, l is its lenght and  w is its width.

2. You know that the rectangle has a length of 9.4 cm and a width of 8.3 cm, therefore, you must substitute these values into the formula. Then, you obtain the following result:

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So, a stack of 1000 quarters will be 1750 mm high.

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