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snow_tiger [21]
3 years ago
8

If you sleep 8 hours out of 24 hours, what percentage of the time do you sleep?

Mathematics
2 answers:
Reptile [31]3 years ago
6 0
1/3 of 24hr is 33.33333333 repeating
kiruha [24]3 years ago
6 0
33.333333...( repeating decimal)
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In 2009, the American Time Use Survey found that the average American spends 2.8 hours a day watching TV. Suppose the standard d
Anit [1.1K]

Answer:

4.72 hours/day

Step-by-step explanation:

Mean time spent watching TV (μ) = 2.8 hours a day  

Standard deviation (σ) = 1.5 hours a day

The 90th percentile (upper 10%) of a normal distribution has an equivalent z-score of roughly z = 1.282. The minimum time spent watching TV, X, at the 90th percentile is:

z=\frac{X-\mu}{\sigma} \\1.282=\frac{X-2.8}{1.5}\\ X=4.72\ hours/day  

On a typical day, you must watch at least 4.72 hours of TV to be in the upper 10%.

8 0
3 years ago
Kamil and Sean share some money in the ratio 3:5. Sean gets $56 more than Kamil. How much do they get each?
liq [111]
Let Kamil get x. Therefore Sean would get (x + 56).

Kamil and Sean are in the ratio:        3:5

That means:    x : (x + 56) = 3 : 5

x / (x + 56) = 3/5

5*x = 3*(x + 56)

5x = 3*x + 3*56

5x = 3x + 168

5x - 3x = 168

2x = 168

x = 168 / 2

x = 84

Therefore Kamil had, x = 84,  and Sean had (x + 56) = 84 + 56 =  140

Kamil had $84 and Sean had $140
3 0
3 years ago
Please help me out people
Juliette [100K]

Answer:

c i think

Step-by-step explanation:

4 0
3 years ago
If f(3) = 15 and f(5) = 45, which of the following could be f(x)?
Katen [24]
F(x) = 2x² - x
f(3) = 2(3)² - 3
f(3) = 2(9) - 3
f(3) = 18 - 3
f(3) = 15

f(x) = 2x² - x
f(5) = 2(5)² - 5
f(5) = 2(25) - 5
f(5) = 50 - 5
f(5) = 45

The answer is C.
5 0
3 years ago
The volume of a sphere is 113.1 cm3; find the diameter of the sphere.
Dennis_Churaev [7]

Answer:

del

Step-by-step explanation:

d

7 0
2 years ago
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