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kicyunya [14]
3 years ago
7

Please someone help me‼️

Mathematics
1 answer:
Flauer [41]3 years ago
4 0

Answer:

6 m

Step-by-step explanation:

The volume of a cone is found by \frac{\pi r^2h}{3}, so we can plug the values in to get 6pi * r^2 / 3 = 72pi, or 6pi * r^2 = 216 pi, so r^2 = 36 and the radius is 6 m.

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An ellipse has a center at the origin, a vertex along the major axis at (0, 17), and a focus at (0, −8). Which equation represen
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We know that
<span>Since the focus and vertex are above and below each other, rather than side by side, I know that this ellipse must be taller than it is wide.
</span>Then 
a²<span> will go with the </span>y<span> part of the equation
</span>Also, since the focus is 8 <span>units below the center, then </span><span>c = 8
</span>since the vertex is 17<span> units above, then </span><span>a = 17
</span>The equation b²<span> = a</span>²<span> – c</span>²<span> gives me
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the equation is
y²/a²+x²/b²=1------> y²/289+x²/225=1

the answer is
y²/289+x²/225=1

see the attached figure

7 0
3 years ago
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Step-by-step explanation:

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What is the sum of the polynomials? (6x+7x+x^2)+(2x^2-3x)
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Step-by-step explanation:

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3 years ago
Don't just guess if you don't know. I need the exact answer please
Arada [10]
You should learn how to do this

20.5
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Pls answer questions 8 and 9 PLSSS<br> The test statistic
marusya05 [52]

Answer:

8) B

9) D

*ASSUMING THE ALPHA-LEVELS FOR THESE PROBLEMS IS .05.*

Step-by-step explanation:

8) Left-tailed test means that the alternate hypothesis is x is less than a certain  value. The p-value, on the calculator, is normalcdf(-999, -1.83) if it's left-tailed, which is .0336. In that case, we would reject the null hypothesis, because the alpha-level is above our p-value.

9) Two-tailed test means that the alternate hypothesis is x does not equal a certain value. The p-value for this, on the calculator, is normalcdf(1.95,999) times two, because we need both tails. In this case, we would fail to reject the null hypothesis, assuming our alpha-level is .05.

  • normalcdf(1.95,999) = .0256*2 = .0512.
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3 years ago
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