Which of the following is an irrational number?4/3 , ^24, ^81, -4.07

1 answer:

6 0

Well lets start by narrowing the answers.
You can't have a fraction as a irrational number so even though 4/3= 1 1/2 its still not an irrational number.
Negative 4.07 also can't be an irrational number because an irrational number is a number that never ends and even thought irrational numbers can be written as decimals -4.07 is not an irrational number.
I don't really want to give u the answer but I did limit ur choices so hope that helps!!!

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The time required for a citizen to complete the 2010 U.S. Census "long" form is normally distributed with a mean of 40 minutes a

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Answer:

Third quartile (Q₃) = 46.75 minutes.

Therefore, Option (c) is the correct answer.

Step-by-step explanation:

Given: Mean (μ) = 40 minutes and S.D (σ) = 10 minutes

To find : Third quartile (Q₃) = ?

Sol: As the third quartile of normal distribution covers the 75% of the total area of the curve and first quartile covers the 25% of the total area of the curve. Then with the help of z score table, the value represented the third quartile of the normal distribution is:

Q₃ = μ + 0.675 σ

Now by substitution the value of mean and standard deviation,

Q₃ = 40 + 0.675 × (10)

Q₃ = 40 + 6.75

Q₃ = 46.75

Therefore, the third quartile (Q₃) = 46.75. So, option (c) is the correct answer.

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