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quester [9]
3 years ago
8

I need help with any of these please try to explain

Mathematics
1 answer:
Nana76 [90]3 years ago
6 0
Its math just use a calculator or something
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A financial advisor is analyzing a family's estate plan. The amount of money that the family has invested in different real esta
Pachacha [2.7K]

Answer:

The amount of money separating the lowest 80% of the amount invested from the highest 20% in a sampling distribution of 10 of the family's real estate holdings is $238,281.57.

Step-by-step explanation:

Let the random variable <em>X</em> represent the amount of money that the family has invested in different real estate properties.

The random variable <em>X</em> follows a Normal distribution with parameters <em>μ</em> = $225,000 and <em>σ</em> = $50,000.

It is provided that the family has invested in <em>n</em> = 10 different real estate properties.

Then the mean and standard deviation of amount of money that the family has invested in these 10 different real estate properties is:

\mu_{\bar x}=\mu=\$225,000\\\\\sigma_{\bar x}=\frac{\sigma}{\sqrt{n}}=\frac{50000}{\sqrt{10}}=15811.39

Now the lowest 80% of the amount invested can be represented as follows:

P(\bar X

The value of <em>z</em> is 0.84.

*Use a <em>z</em>-table.

Compute the value of the mean amount invested as follows:

\bar x=\mu_{\bar x}+z\cdot \sigma_{\bar x}

   =225000+(0.84\times 15811.39)\\\\=225000+13281.5676\\\\=238281.5676\\\\\approx 238281.57

Thus, the amount of money separating the lowest 80% of the amount invested from the highest 20% in a sampling distribution of 10 of the family's real estate holdings is $238,281.57.

6 0
3 years ago
What is 3/5 ÷ 3/7 help please
Rus_ich [418]
3/5 /  3/7

= 3/5 * 7/3

= 7/5   or 1 2/7
8 0
3 years ago
1) 5x + 3 = 23<br> Is the value of x 4
Nataly [62]

Answer:

X = 4

Step-by-step explanation:

5x + 3 = 23

Subtract 3 from both sides: 5x = 20

Divide both sides by 5: x = 4

3 0
3 years ago
A certain number added to its square is 30. Find the number
Alex Ar [27]
X+x²=30
x²+x-30=0
(x+6)(x-5)=0
x=-6 or x=5
5 0
3 years ago
What is -2 x -2 x -2 x -2 = to?
kherson [118]

Answer:

since there are an even number of negatives, just ignore them and multiply normally. 2 x 2=4

4 x 2=8

8 x 2=16

The answer is 16

4 0
3 years ago
Read 2 more answers
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