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Vsevolod [243]
2 years ago
10

Yellow birds flight path can be modeled by the quadratic equation y= - 2^x + 14x - 24.

Mathematics
1 answer:
Fudgin [204]2 years ago
4 0

\large{|\underline{\mathtt{\red{a}\blue{x}\orange{i}\pink{s}\blue{ \: }\purple{of}\green{ \: }\red{sy}\blue{mm}\orange{etry}}}}

\large \sf \: x =  \frac{7}{2}

\large{|\underline{\mathtt{\red{m}\blue{a}\orange{x}\pink{i}\blue{m}\purple{u}\green{m}\red{ \: }\blue{v}  \red{a}  \pink{l} \purple{u}\orange{e}}}}

\large \sf \frac{1}{2}  \: at \: x =  \frac{7}{2}

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A mortgage firm estimates the true mean current debt of local homeowners, using the current outstanding balance of a random samp
Nat2105 [25]

Answer:

b. Using the balances of 50 homeowners rather than 35, because using more data gives a smaller margin of error

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

95% confidence interval

\alpha = \frac{1-0.95}{2} = 0.025

Now, we have to find z in the Ztable as such z has a pvalue of 1-\alpha.

So it is z with a pvalue of 1-0.025 = 0.975, so z = 1.96

99% confidence interval

\alpha = \frac{1-0.99}{2} = 0.005

Now, we have to find z in the Ztable as such z has a pvalue of 1-\alpha.

So it is z with a pvalue of 1-0.005 = 0.995, so z = 2.575

Now, find we find the width of our confidence interval M as such

M = z*\frac{\sigma}{\sqrt{n}}

So, as n increases, the width of the confidence interval decreases.

From the examples above, we can also conclude that as the confidence level increases, so does the value of z, which means that the width of the interval increases.

Which of the following would correctly produce a confidence interval with a smaller margin of error than this 95% confidence interval?

For a smaller margin of error, we need to have a bigger sample size.

So the correct answer is:

b. Using the balances of 50 homeowners rather than 35, because using more data gives a smaller margin of error

5 0
3 years ago
A person places $661 in an investment account earning an annual rate of 7.1\% , compounded continuously . Using the formula V =
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Answer: $2058.54

Step-by-step explanation:

V = p*e^rt

5 0
3 years ago
What is the distance between the points (2, 1) and (14, 6) on a coordinate
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The distance between the points (2,1) and (14,6) on a coordinate is C. 13 units
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3 years ago
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Solve this equation: 4+k=11
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Answer:

k=7

Step-by-step explanation:

4+k=11

subtract 4 from both sides to isolate k

k= 7

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3 years ago
To which subset does the following number belong? √7
marishachu [46]
Irrational numbers. √7 is an irrational number.
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