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katrin [286]
2 years ago
14

. The land area of Charlotte, NC is approximately 3 x 102 square miles.

Mathematics
1 answer:
lidiya [134]2 years ago
7 0

Answer:

Option A

Step-by-step explanation:

Land area of Charlotte, NC = 3\times 10^2 square miles

Scale to be used,

1 square miles = 6.4\times 10^2 square acres

By this scale,

3\times 10^2 square miles = (6.4\times 10^2)\times(3.2\times 10^2) square acres

                                  = (6.4\times 3)\times 10^{2+2}

                                  = 19.2\times 10^4 square acres

                                  = 1.92\times 10^5 square acres

Therefore, Option A will be the correct option.

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hichkok12 [17]

Answer:

A  99% confidence interval  will be wider than a 95% confidence interval

Step-by-step explanation:

From the question we are told that

  The  95% confidence interval for for the mean foot length for students at the college is found to be 21.709 to 25.091 cm

Generally the width of a confidence interval is dependent on the margin of error.

Generally the margin of error is mathematically represented as  

     E =  Z_{\frac{\alpha }{2} } * \sqrt{\frac{\^ p (1- \^ p)}{n} }

From the above equation we see that

          E \ \  \alpha \ \   Z_{\frac{\alpha }{2} }

Here  Z_{\frac{\alpha }{2} }  is the critical value of the half of the level of significance and this value  increase as the confidence level increase

Now if a  99% confidence level is  used , it then means that the value of  

 Z_{\frac{\alpha }{2} }  will increase, this in turn will increase  the margin of error and in turn this will increase the width of the confidence interval

Hence a 99% confidence interval  will be wider than a 95% confidence interval

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3 years ago
HELP WITH SOME GEOMETRY. 20 POINTS
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Find the multiplicative inverse of -2 in mod 7<br>​
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Answer:

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  5. note there is also a mathematical procedural way to solve this.
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6 0
2 years ago
Is x + 10 a factor of the function f(x) = x3 − 75x + 250? Explain.
PtichkaEL [24]
Yes. When the function f(x) = x3 – 75x + 250 is divided by x + 10, the remainder is zero. Therefore, x + 10 is a factor of f(x) = x3 – 75x + 250. 

According to the remainder theorem when f(x) is divided by (x+a) the remainder is f(-a). 
In this case, 
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=x^3-75x+250 
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3 years ago
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BabaBlast [244]
Try 147? it may be wrong but i though that with that type of thing the middle one is supposed to equal double the bottom.
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