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4 years ago

Please help this is urgent!!!

Mathematics

1 answer:

svet-max [94.6K]4 years ago

7 0

Answer:52

X+150=180. x=30

Y+82=180. y=98

X+y+z=180. Z=128

Z+b=180. b=52

Step-by-step explanation:

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The ratio of a model car to the size of an actual car is 1:40. If the model is 4.5 inches long, what is the length of the full s

musickatia [10]

4.5x40=
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4 years ago

h(t)=-5t^2+10t+3 is the height of a diver above the water, t seconds after the diver leaves the springboard. How high above the

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Answer:

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Step-by-step explanation:

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4 years ago

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maksim [4K]

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Step-by-step explanation:

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3 years ago

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YThe Pew Research Center conducted a survey of 1007 adults and found that 85% of them know what Twitter is. Find a 90% confidenc

goblinko [34]

Answer:

The 90% confidence interval is $0.8315 < p < 0.8685$

Step-by-step explanation:

From the question we are told that

The sample size is n = 1007

The sample proportion is $\^ p = 0.85$

From the question we are told the confidence level is 90% , hence the level of significance is

$\alpha = (100 - 90 ) \%$

=> $\alpha = 0.10$

Generally from the normal distribution table the critical value of $\frac{\alpha }{2}$ is

$Z_{\frac{\alpha }{2} } = 1.645$

Generally the margin of error is mathematically represented as

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

=> $E =1.645 * \sqrt{\frac{0.85 (1- 0.85 )}{1007}}$

=> $E = 0.0185$

Generally 90% confidence interval is mathematically represented as

$\^ p -E < p < \^ p +E$

=> $0.85 -0.0185 < p < 0.85 + 0.0185$

=> $0.8315 < p < 0.8685$

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3 years ago

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Masteriza [31]

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3 years ago

Please help this is urgent!!!​

Please help this is urgent!!!