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levacccp [35]
3 years ago
6

A hyperbola has its center at (0,0), a vertex of (20,0 and an asymptote of y= 13/20x. find the equation that describes the hyber

bola
Mathematics
1 answer:
photoshop1234 [79]3 years ago
4 0

Answer:

\frac{x^2}{20^2} -\frac{y^2}{13^2} =1

Step-by-step explanation:

Given that a hyperbola has its centre at (0,0)

Asymptote = y =13x/20

Vertex is on x axis thus a =20

Hence hyperbola will have equation as

\frac{x^2}{20^2} -\frac{y^2}{b^2} =1

Asymptotes would be

\frac{x^2}{20^2} -\frac{y^2}{b^2} =0

Or y=bx/20

Comparing with given equation we get b =13

Hence asymptote would have equation as

\frac{x^2}{20^2} -\frac{y^2}{13^2} =1\\\frac{x^2}{400} -\frac{y^2}{169} =1

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A study sampled 350 upperclassmen (Group 1) and 250 underclassmen (Group 2) at high schools around the city of Houston. The stud
iris [78.8K]

Answer:

-0.048

Do not reject  H_0:P_1-P_2=0

Step-by-step explanation:

From the question we are told that

Sample size n_1=350

Sample size n_2=250

Sample proportion 1  \hat P= \frac{25}{350} =>0.07

Sample proportion 2 \hat P= \frac{19}{250} =>0.076

95% confidence interval

Generally for 95% confidence level

Level of significance

 \alpha = 1-0.95=>0.05

 \alpha /2=\frac{0.05}{2} =>0.025

Therefore

Z_a_/_2=1.96

Generally the equation for confidence interval between P_1 - P_2  is mathematically given as

(\hat P_1-\hat P_2)\pm Z_a_/_2\sqrt{\frac{\hat P_1(1-\hat P_1)}{n_1}+\frac{\hat P_2(1-\hat P_2)}{n_2}  }

(0.07-0.076)\pm 1.96\sqrt{\frac{0.07(1-0.07)}{350}+\frac{0.076(1-0.076)}{250}  }

(0.07-0.076)\pm 1.96\sqrt{4.66896*10^-^4  }

(-0.006)\pm 0.042

(-0.006)- 0.042=>-0.048

(-0.006)+ 0.042=>0.036

Therefore

Confidence interval is

-0.048

Conclusion

Given the confidence interval has zero

Therefore do not reject  H_0:P_1-P_2=0

6 0
2 years ago
To the nearest millimeter,a cell phone is 132 mm and 69 mm wide. What is the ratio of the width to the length
ZanzabumX [31]

Answer:

23:44 or 1:1.91

Step-by-step explanation:

w:l =69:132     Divide each number by   3

     = 23:44     Divide each number by 23

     ≈   1:1.91

The width-to-length ratio is 23:44 or approximately 1:1.91

7 0
3 years ago
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