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Zanzabum
1 year ago
7

The mean value of 500 homes in a county is $225,000 and the standard deviation is $25,000. approximately how many of the homes i

n the county are between $175,000 and $225,000?
Mathematics
1 answer:
dusya [7]1 year ago
3 0

240 homes in the county are between $175,000 and $225,000.

The image attached is associated with this question and m in it refers to the mean value which is $225000 here and d refers to the standard deviation which is $25000 here.

Now since m= $225000

and $175000= $225000-$50000= $225000-(2* $25000)= m-2d

Thus, as per the image area covered between m and m-2d=  $225000

and $175000 is (34%+14%)of 500 homes= 68% of 500= 240 homes, is the answer.

A random variable X is said to follow a normal distribution if its parameters are mean and standard deviation. Every other distribution can be reduced to a normal distribution.

Learn to know more about normal distributions on brainly.com/question/4079902

#SPJ4

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8 0
3 years ago
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MrMuchimi

Answer:

-7 , -5

Step-by-step explanation:

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4 0
3 years ago
Which expression is equivalent to (4mn/m^-2n^6)^-2
Illusion [34]
First, we get rid of the negative exponent in the parenthesis.  We do this by moving it to the top.  Our equation is now:

( \frac{4m^3n}{n^6})^{-2}

Next, we can cross out one n from both the top and the bottom.

(\frac{4m^3}{n^5} )^{-2}

Finally, we evaluate the -2

Our equation becomes:

\frac{ (4*m^3)^{-2}  }{(n^5) ^{-2} }

This becomes: \frac{(n^5)^2}{(4*m^3)^2} =  \frac{ n^{10} }{16*m^6}

This can not be simplified any further, so this is the final answer.
5 0
3 years ago
The population of bald eagles is decreasing 4% each year. In 2015, there were 2800 bald eagles.
Vladimir [108]

Answer:

1120 Eagles

Step-by-step explanation:

If the population of Eagles decreases by 4% percent each year, then in 2030 (which is 15 years later), the population would decrease by (4 × 15)%

that is 60%

This indicates that the population of bald eagles in the year 2030 would be 60% less of what it was in the year 2015.

so we have, \frac{60}{100} × 2800

which gives us 1680

this means that the number of bald eagles in the year 2030 would be 1680 less than the number of bald eagles in the year 2015

hence 2800 - 1680

then the answer is 1120 Bald Eagles

7 0
2 years ago
Read 2 more answers
PLEEEEAAASSEEE HELP!!!! I WILL GIVE BRAINLIEST TO WHOMEVER ANSWERS CORRECTLY FIRST!!!
adelina 88 [10]

Answer:

b. is the answer.

Step-by-step explanation:

I took the test and that was the answer.

4 0
3 years ago
Read 2 more answers
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