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frutty [35]
3 years ago
7

What is rank correlation?​

Mathematics
1 answer:
Irina-Kira [14]3 years ago
6 0

Step-by-step explanation:

it's any of several statistics that measure an ordinal association. Measures the degree of similarity between two rankings.

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The force exerted by an electric charge at the origin on a charged particle at a point (x, y, z) with position vector r = x, y,
suter [353]

Answer:

\frac{25k}{34}[\frac{1}{4}-\frac{1}{50^{1/2}}] \\

Step-by-step explanation:

The straight line path between point (a,b,c) and (l,m,n) is parametric by the expression

r(t)=(1-t)(a,b,c) +t(l,m,n)\\

since we are giving point (4,0,0) and (4,3,4), the parametric equation is giving below

r(t)=(1-t)(4,0,0) +t(4,3,4)\\

using the dot product system of multiplication, we have

r(t)=(4,3t,4t) \\

t is between 0,1.

Next we define the line integral for work done which is express as

\int\limits^a_b {F.} \,dr\\

First we define the general expression for the force

f(x,y,z)=\frac{K(x,y,z)}{(x^{2}+y^{2}+z^{2})^{3/2}} \\

If we substitute our parametric equation we arrive at

F(r(t))=\frac{K(4,3t,4t)}{(4^{2}+(3t)^{2}+(4t)^{2})^{3/2}}\\F(r(t))=\frac{K(4,3t,4t)}{(16+34t^{2})^{3/2}}\\

also we need to find the expression for <em>dr</em>

r(t)=(4,3t,4t)\\dr=(0,3,4)dt\\

Now we substitute into the integral expression

\int\limits^1_0 {\frac{k(4,3t,4t)}{(16+34t^{2})^{3/2}}} \, .(0,3,4)dt

using dot product we arrive at

\int\limits^1_0 {\frac{25kt}{{(16+34t^{2})^{3/2}} } \,

let make a simple substitution so we can simplify the integral,

let assume u=16+34t^{2}\\

\frac{du}{dt}=68t\\ dt=\frac{du}{68t} \\

and changing setting the new upper and lower limit, we have

\frac{25k}{68} \int\limits^a_b {\frac{1}{u\frac{3}{2} } } \, du\\a=50\\b=16\\

by simple integral we arrive at

-\frac{25k}{34}[\frac{1}{u^{1/2}}] ^{50}_{16} \\\frac{25k}{34}[\frac{1}{4}-\frac{1}{50^{1/2}}] \\

Hence the workdone is

\frac{25k}{34}[\frac{1}{4}-\frac{1}{50^{1/2}}] \\

3 0
3 years ago
What would it cost Leopold to put decorative fencing along the top and bottom lengths of the fencing costs $2.25 per foot?
Ann [662]

270 dollars because 1440 divided by 12 equals 120. 120 times 2.25

is $270.000

5 0
3 years ago
PLEASE HELP. Will give brainliest. A number divided by 4, minus 3 is 0. What is the number?
anzhelika [568]

Answer:

the answer is 12

Step-by-step explanation:

12÷4 =3-3=0

5 0
3 years ago
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Inside the container there is empty space not taken up by the volleyball. What is the volume of that empty space? Use 3.14 for π
marta [7]

Answer: 4,599 I'm going to say this based off my test. Yet you didn't say how big the volleyball was. For example, if it was like 12 or 14 inches. I can change my answer if you are more detailed. Have a nice day!


Step-by-step explanation:


5 0
3 years ago
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Jay earned $432.18 in net pay for working 32 hours. He paid $82.42 in federal and state taxes, and $31.70 in FICA taxes.
Neporo4naja [7]
1) $17.07 
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3) 79%
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4 years ago
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