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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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2 years ago
The circle with center O has a minor arc BSA with a length of
tangare [24]

Answer:

D. \frac{27\pi}{2} inches.

Step-by-step explanation:

We have been given that the circle with center O has a minor arc BSA with a length of 3\pi^{2} inches. The central angle is 40°.

To find the circumference of circle we will use formula:

\frac{\text{Central angle}}{2\pi}=\frac{\text{Arc length}}{2\pi r}, where 2\pi= measure of 360 degrees in radians and 2\pi r= circumference of circle.  

Let us convert measure of central angle into radians.                        

40^{o}=\frac{40*\pi}{180} =\frac{2\pi}{9}

Upon substituting our given value in the formula we will get,        

\frac{\frac{2\pi}{9}}{2\pi}=\frac{\frac{3\pi}{2}}{2\pi r}

\frac{2\pi}{18\pi}=\frac{3\pi}{4\pi r}    

\frac{1}{9}=\frac{3}{4r}      

Cross multiplying we will get,      

4r=27  

r=\frac{27}{4}

Hence, the radius of our circle is 27/4 inches.  

Since the circumference of circle is 2\pi r. Upon substituting  r=\frac{27}{4} we will get,

2\pi r=2\pi* \frac{27}{4}=\frac{27\pi}{2}

Therefore, circumference of our given circle will be \frac{27\pi}{2} inches and option D is the correct choice.

6 0
3 years ago
What is the missing constant term in the perfect square that starts with x2 – 12x ?
Dima020 [189]

Answer:

x^2 -12x+36

Step-by-step explanation:

x^2 – 12x

Take the coefficient of x

-12

Divide by 2

-12/2 = 6

Square it

6^2 = 36

We need to add 36 to make x^2 -12x a perfect square trinomial

x^2 -12x+36

8 0
3 years ago
5/16 as a decimal..?
madam [21]

Answer:

0.3125

Step-by-step explanation:

type that into a calculator

7 0
3 years ago
Read 2 more answers
Keenan currently does a total of 8 pushups each day. He plans to increase the number of pushups he does each day by 2 pushups un
Viefleur [7K]

Answer:

12

Step-by-step explanation:

Given that

Current count of pushups = 8

Number of increase in pushups each day = 2

The desired pushup goal on daily basis = 30

Days require = x= ?

as we can conclude the number of pushups would increase by following sequence

8, 10, 12, 14, 16, ......30

Now as we can be the number of pushups by a constant number each day it means this sequence is arithmetic.

First term of our sequence is X1 and the final term is Xn, and the difference between two consecutive terms (Common Difference) is 2.

So

X1 = 8

Xn = 30

d = 2

Using the formula of nth term for arithmetic sequence

Xn = X1 + (n-1)d

Substituting the values

30 = 8 + (n-1)2

30-8 = (n-1)2

22 = 2n -2

22+2 = 2n

2n = 24

n = 24/2

n = 12

So, it means on the 12th day he will have to do 30 pushups if he starts from 8 and increase 2 pushups each day.


5 0
4 years ago
Read 2 more answers
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