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Lelechka [254]
3 years ago
6

How much does it cost to run a computer for 50 hours in a week if the monitor runs on 140 Watts and the tower runs on 260 Watts

and the Electric Company charges 11.2 cents per kilowatt-hour?​
Mathematics
1 answer:
dangina [55]3 years ago
8 0

Answer:

Total cost will be 224 cents

Step-by-step explanation:

We have given that total time t = 50 hour

It is given that monitor ruins at 140 watts

So P = 140 watt

We know that energy = power × time

So energy required for monitor run = 140×50 = 7000 watt hour = 7 kWh

Now tower runs at a power of 260 watts

So power P = 260 watt

So energy required for tower run = 260×50 = 13 kWh

Total energy required = 13 +7 =20 kWh

It is given that company charges 11.2 cents per kilowatt hour  

So total cost = 12×11.2 = 224 cents

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If the probability of selecting, without replacement, 2 red marbles from a bag containing only red and blue marbles is 3 55 and
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Answer:

Step-by-step explanation:

Let T = the TOTAL number of marbles in the bag.

We are told that 3 of those marbles are red

P(select a red marble first) = 3/T

Once we've removed the first red marble, there are T-1 marbles remaining and 2 of them are red

So, P(select a red marble second) = 2/(T-1)

Okay, now let's use probability rules to answer the question....

P(select 2 red marbles) = P(select a red marble first AND select a red marble second)

= P(select a red marble first) x P(select a red marble second)

= 3/T x 2/(T-1)

= 6/(T² - T)

We're told that P(select 2 red marbles) = 3/55

So, we can write: 6/(T² - T) = 3/55

Cross multiply to get: 3(T² - T) = (6)(55)

Divide both sides by 3 to get: T² - T = (2)(55)

Evaluate: T² - T = 110

Rearrange: T² - T - 110 = 0

Factor: (T - 11)(T + 10) = 0

So, EITHER T = 11 OR T = -10

Since T cannot be negative, it must be the case that T = 11

6 0
2 years ago
A used car dealer sells SUVs and cars. Of all the vehicles, 85% are cars. Of all the vehicles, 32% are red cars. What is the pro
oksian1 [2.3K]

Answer:

37.6%

Step-by-step explanation:

P(A|B) = P(A and B) / P(B)

P(red | car) = P(red and car) / P(car)

P(red | car) = 0.32 / 0.85

P(red | car) = 0.376

8 0
3 years ago
How do i simplify this problem?<br><br>12r+5s-7T+9s-4r​
Nimfa-mama [501]

Answer: To simplify this problem you combine the like terms in the equation (numbers with the same variables.)

Demo: 12r + -4r = 8r

4 0
3 years ago
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There is a number line below and an equation. How do you solve the equation and then put it on the number line?
jasenka [17]
Im sure youve figured it out by now

7 0
3 years ago
The deck on a home is shaped like a parallelogram. The parallelogram has an area of 544.5 ft2 and a base measurement of 16.5 ft.
defon

<u><em>Answer:</em></u>

The height of the parallelogram is 33 ft

<u><em>Explanation:</em></u>

<u>The area of the parallelogram can be calculated using the following rule:</u>

Area of parallelogram = base * height

<u>In the problem, we are given that:</u>

Area = 544.5 ft²

Base = 16.5 ft

<u>Substitute with the given values in the above equation and solve for the height as follows:</u>

Area = base * height

544.5 = 16.5 * height

height = \frac{544.5}{16.5} = 33 ft

Hope this helps :)

5 0
3 years ago
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