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3 years ago

What is the radius for the circle given by the equation x^2+(y -3)^2 = 21

Mathematics

2 answers:

Leviafan [203]3 years ago

8 0

Answer:

4.583

Step-by-step explanation:

The equation for the radius r of a circle can be found from

(x – h)2 + (y – k)2 = r2,

Where h and k are the center points along the x and y axis respectively.

Comparing with the equation given;

x^2+(y -3)^2 = 21

h = 0, y = 3 and r^2 = 21

r = √21

= 4.583 (to the nearest thousand)

Note that unit of measurement may apply where given.

MatroZZZ [7]3 years ago

3 0

$\bf\textit{equation of a circle}\\\\(x- h)^2+(y- k)^2= r^2\qquadcenter~~(\stackrel{}{ h},\stackrel{}{ k})\qquad \qquadradius=\stackrel{}{ r}\\\\[-0.35em]\rule{34em}{0.25pt}\\\\x^2+(y-3)^2=21\implies (x-0)^2+(y-3)^2=(\sqrt{21})^2\qquad \begin{cases}center~(0,3)\\r=\sqrt{21}\end{cases}\\\\\\r\approx 4.58257569495584000659\implies r = \stackrel{\textit{rounded up}}{4.583}$

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Answer:

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Step-by-step explanation:

The coefficient of variation is defined as the percentage relative variation of a set of data with respect to its average. And it is calculated like this:

$CV=\frac{\bar X}{S}$

$S =\sqrt{\frac{1}{n-1} \sum_{i=1}^n (x_i-\bar{x})^2$

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For systolic pressure data:

$\bar X =127.2\\\\S=17.91668\\\\CV=\frac{17.91668}{127.2}=0.14085$

For diastolic pressure data:

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3 years ago

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Answer:

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Step-by-step explanation:

Zeros of any equation means, value of variable x at y = 0.

Given quadratic equation is,

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Points showing the x-intercepts will be,

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3 years ago

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il63 [147K]

Answer:

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Step-by-step explanation:

We are given the following information in the question:

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