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Pie
2 years ago
15

19. Find an equation of the parabola that satisfies the given conditions.

Mathematics
1 answer:
GalinKa [24]2 years ago
6 0

Here, the focus of the parabola is (2,0) and directrix is x=−2.

So, equation of parabola will be y2=4ax

Here,a=2.So, Equation becomes,

y2=4∗2x⇒y2=8x, which is the required equation of parabola.

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Mrs. Norton wants to buy health insurance for her family, Plan A costs $620.50 per month. Plan B costs $597.20 per month. How mu
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Step-by-step explanation:

620.50 * 12 = 7,446

597.20 * 12 = 7,116.4

7446 - 7116.4 = 329.6

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(i picked c am i right?) What is the product in lowest terms?
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Find the measure of each angle using the triangle sum theorem and exterior angle theorem
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What kind of boundary line represents an inequality that is &lt; or &gt;
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A supervisor records the repair cost for 22 randomly selected VCRs. A sample mean of $75.50 and standard deviation of $18.07 are
Virty [35]

Answer:

<em>  The 99% confidence interval for the mean repair cost for the VCRs</em>

(65.801, 85.199)

Step-by-step explanation:

<u><em>Explanation:-</em></u>

Mean of the sample(x⁻) = $75.50

Given the standard deviation of the sample (S) =  $18.07

Given the size of the sample 'n' = 22

Degrees of freedom = n-1 =22-1 =21

critical value t₍₀.₀₁, ₂₁₎ = 2.5176

<em> The 99% confidence interval for the mean repair cost for the VCRs</em>

(x^{-} - t_{0.01} \frac{S.D}{\sqrt{n} } , x^{-} +t_{0.01} \frac{S.D}{\sqrt{n} })

(75.50 - 2.5176 \frac{18.07}{\sqrt{22} } , 75.50 +2.5176 \frac{18.07}{\sqrt{22} })

( 75.50 - 9.699 , 75.50 + 9.699 )

(65.801, 85.199)

<u><em>Final answer:-</em></u>

<em> The 99% confidence interval for the mean repair cost for the VCRs</em>

(65.801, 85.199)

8 0
3 years ago
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