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IceJOKER [234]
2 years ago
15

A school principal is trying to collect data about how often students earn detention. To do so, she gives a 7-question survey du

ring detention one afternoon. Which of the following is likely to cause bias in the data?
A.The survey is conducted in the afternoon
B.The survey is only conducted on one day
C.The survey is only given to scholars who earned detention
D.The survey did not have enough questions
Mathematics
1 answer:
ExtremeBDS [4]2 years ago
3 0

Answer:

B

Step-by-step explanation:

I think B is right because it's only on one day so that one day could have way more kids than usual or way less.

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Convert. Round to the nearest hundredth if necessary.
denpristay [2]

Answer:

Step-by-step explanation:

1 gallon = 3.78litres

hence if the acid is $33.19/gal

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1 litre will be sold for $8.78

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6 0
3 years ago
Provide an example of a system of two linear equations that has no
viva [34]

Answer:

Step-by-step explanation:

No solutions....means the lines are parallel...means ur 2 equations have to have the same slope but different y intercepts

y = 2x + 4 and y = 2x + 3

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Infinite solutions...means u have the same line

y = 2x + 4 and 2y = 4x + 8....notice how if u reduce the 2nd one by dividing everything by 2 u get y = 2x + 4...same line

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1 solution....means ur equations will have different slopes and different y intercepts.

y = 2x + 4 and y = 4x + 2

now, u can pick which one u want :)

3 0
3 years ago
Pls help answer this soon!!!!!
vladimir1956 [14]
13a) y = 0.45x

13b) 52 * 0.45 = 23.4

13c) I will let u figure this one out
7 0
3 years ago
Read 2 more answers
Use chain rule to find dw/dt w=ln(x^2 + y^2 + z^2)^(1/2) , x=sint, y=cost, z=tant
son4ous [18]
The chain rule states that

\dfrac{\mathrm dw}{\mathrm dt}=\dfrac{\partial w}{\partial x}\dfrac{\mathrm dx}{\mathrm dt}+\dfrac{\partial w}{\partial y}\dfrac{\mathrm dy}{\mathrm dt}+\dfrac{\partial w}{\partial z}\dfrac{\mathrm dz}{\mathrm dt}

Since \ln(x^2+y^2+z^2)^{1/2}=\dfrac12\ln(x^2+y^2+z^2), you have

\dfrac{\partial w}{\partial x}=\dfrac x{x^2+y^2+z^2}
\dfrac{\partial w}{\partial x}=\dfrac y{x^2+y^2+z^2}
\dfrac{\partial w}{\partial z}=\dfrac z{x^2+y^2+z^2}

and

\dfrac{\mathrm dx}{\mathrm dt}=\cos t
\dfrac{\mathrm dy}{\mathrm dt}=-\sin t
\dfrac{\mathrm dz}{\mathrm dt}=\sec^2t

Also, since x^2+y^2+z^2=\sin^2t+\cos^2t+\tan^2t=1+\tan^2t=\sec^2t, the derivative is

\dfrac{\mathrm dw}{\mathrm dt}=\dfrac{\sin t\cos t}{\sec^2t}-\dfrac{\sin t\cos t}{\sec^2t}+\dfrac{\tan t\sec^2t}{\sec^2t}
\dfrac{\mathrm dw}{\mathrm dt}=\tan t
4 0
3 years ago
Circle O is shown. Line segments E O and E O are radii with length 24. Angle D O E is 45 degrees. The area within sector D O E i
AfilCa [17]

Answer:

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Step-by-step explanation:

Took it on Edge and got it right

7 0
3 years ago
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