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Rus_ich [418]
3 years ago
7

The circumference of a sphere was measured to be 78 cm with a possible error of 0.5 cm. (a) Use differentials to estimate the ma

ximum error in the calculated surface area. (Round your answer to the nearest integer.) cm2 What is the relative error
Mathematics
1 answer:
Maru [420]3 years ago
3 0

Answer:

The maximum error is  dS = 25 \ cm^{2}

Relative error is Relative error is = \frac{1}{78}

Step-by-step explanation:

Circumference of a sphere C = 2\pi r

Differentiate above equation with respect to r

\frac{dC}{dr} = 2\pi

dr = \frac{dC}{2\pi}

Given that dC = 0.5  cm

dr = \frac{0.5}{2\pi}

dr = \frac{1}{4\pi}

Surface area of the sphere S = 4\pi r^{2}

Differentiate above equation with respect to r

\frac{dS}{dr} = 8 \pi r

dS = 4 C dr

Where C = circumference of the sphere

given that C = 78 cm  & dr = \frac{1}{4\pi}

So the maximum error is given by

dS = 4 (78)(\frac{1}{4\pi} )

dS = \frac{78}{\pi}

dS = 25 \ cm^{2}

Now the relative error is given by

Relative error = \frac{dS}{S}

⇒ \frac{\frac{78}{\pi} }{4\pi r^{2} }

Since r = \frac{C}{2 \pi}

Relative error is = \frac{1}{78}

Therefore the maximum error is  dS = 25 \ cm^{2}

Relative error is Relative error is = \frac{1}{78}

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Horizontal shift because g(x)=f(x+1) 1 unit left

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Step-by-step explanation:

We need to identify which transformation have been preformed on a graph of f(x)=x2 to obtained the graph of g(x) =-3(x+1)2-4?

Rules for transformation:

Horizontal shift: depends on the value h

if g(x)=f(x+h) then: the graph is shifted left h units

if g(x)=f(x-h) then: the graph is shifted right h units

Vertical Shift: depends on the value k

if g(x)=f(x)+k then: the graph is shifted up k units

if g(x)=f(x)-k then: the graph is shifted down k units

Reflection:

if g(x)=-f(x) then graph is reflected at x-axis

if g(x)=f(-x) then graph is reflected at y-axis

Vertical Stretch:

if g(x)=c.f(x) then graph is vertically stretched.

In the given question:

f(x)= x^2

g(x)=-3(x+1)^2-4

Applying the above rules of transformation:

The graph is:

Horizontal shift because g(x)=f(x+1) 1 unit left

Vertical shift because g(x)=f(x+1)-4 4 units down

Reflected across x-axis because g(x)=-f(x)

Vertically stretched because g(x)=3(f(x))

Keywords: Transformations

Learn more about Transformations at:

  • brainly.com/question/2415963
  • brainly.com/question/3779181
  • brainly.com/question/5563823
  • brainly.com/question/9381523

#learnwithBrainly

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Answer:

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Step-by-step explanation:

The (1 - <em>α</em>)% confidence interval for population mean is:

CI=\bar x\pm z_{\alpha/2}\times\frac{\sigma}{\sqrt{n}}

The (1 - α)% confidence interval for population parameter implies that there is a (1 - α) probability that the true value of the parameter is included in the interval.

Or, the (1 - α)% confidence interval for the parameter implies that there is (1 - α)% confidence or certainty that the true parameter value is contained in the interval.

The 95% confidence interval for the average height of male students at a large college is, (63.5 inches, 74.4 inches).

The 95% confidence interval for the average height of male students (63.5, 74.4) implies that, there is a 0.95 probability that the true mean height of all male student at the large college is between the interval (63.5, 74.4).

Or, there is a 95% confidence that the true mean height of all male student at the large college is between the interval (63.5, 74.4).

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stealth61 [152]

Answer:

Step-by-step explanation:

y ∝ x^2

Introducing the proportionality constant, we have  

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