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Nikolay [14]
2 years ago
8

A light bulb consumes 3600 watt-hours per day. How many watt-hours does it consume in 5 days and 6 hours?

Mathematics
1 answer:
Cerrena [4.2K]2 years ago
8 0

Answer:

18900 watt-hours

Step-by-step explanation:

3600 x 24 (hours in a day) = 150

150 x 6 (hours) = 900

3600 (watt hours per day) x 5 (days) = 18000

18000 x 900 = 18900

total= 18900

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mamaluj [8]

Answer:

Mean = 35

Variance = 291.7

Step-by-step explanation:

Data provided in the question:

X : 1, 2, 3, 4, 5, 6

All the data are independent

Thus,

The mean for this case will be given as:

Mean, E[X] = \frac{\textup{Sum of all the observations}}{\textup{Total number of observations}}

or

 E[X] = \frac{\textup{1+2+3+4+5+6}}{\textup{6}}

or

E[X] = 3.5

For 10 days, Mean = 3.5 × 10 = 35

And,

variance = E[X²] - ( E[X] )²

Now, for this case of independent value,

E[X²] = \frac{1^2+2^2+3^2+4^2+5^2+6^2}{\textup{6}}

or

E[X²] = \frac{1+4+9+16+25+36}{\textup{6}}

or

E[X²] = \frac{91}{\textup{6}}

or

E[X²] = 15.167

Therefore,

variance = E[X²] - ( E[X] )²

or

variance = 15.167 - 3.5²

or

Variance = 2.917

For 10 days = Variance × Days²

= 2.917 × 10²

= 291.7

3 0
3 years ago
Kurt earns $6 a week for doing chores. How many weeks will it take him to earn $50 if he has already earned $10 ? Explain how yo
olga2289 [7]

50-10 = 40. 40 divided by 6 = around 6/7. So about 6/7 weeks

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3 years ago
Dave walked to his friend's house at a rate of 4mph and returned back biking at a rate of 10mph. If it took him 18 minutes longe
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I think this would be....

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Step-by-step explanation:

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3 years ago
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8 0
3 years ago
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