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D

The probabilty of getting a yellow bead from a pile of 70 yellow beads and 30 pink beads can be determined like this:

30 + 70 = 100, which represents the total amount of beads. 

Now, to find the probabilty, we divide 70 by 100, 

70 / 100 = 0.7, or 70%.

Since yellow beads are succesful, D is the correct answer!

Once again, I do not see the dot plot, may you please repost so I may help you?

I do not see the dot plot, may you repost so I may help you?

I'm not a biology expert but here is what I know:

A physical examination of the cat can determine if the cat has any injuries, for example a bite from a predator that caused the tail to come off. This might help with determining whether the change was caused by a genetic mutation or it was due to an accident. 

Checking offspring also might help. A genetic mutation has a chance to be passed on to the next generation, but the offspring might also mutate. 

The rest is not as helpful.

I think it is either a or b. 

I hope this helped! :)

thankyou! and i figured!  i wasnt upset  i just got frustrated because i really dont understand this

I will give you a "Personal Opinion"!!. The reason, I believe, that your questions haven't been answered, is because not many people here feel competent enough to answer questions in "Statistics" because it is considered to be a difficult subject. So, please don't feel bad, because there is nothing personal against you.

Thanks so much, CPhill! 

Since the perimeter of PQRS = 24 and QP=RS = 5 + 5 = 10. Therefore PS=QR =[24 - 10] / 2 = 7

And since the area of PQRS = 28, therefore the Height =28/7 =4=ST, since area of PQRS = base x height.Therefore the right triangle RST is a 3, 4, 5 triangle with RT = 3.

RT + QR =3 + 7 =10 =QT. Therefore the perimeter of the rectangle QOST =2[4 +10] = 28.

CPhill: I think the young person wants the PERIMETER, not the Area.

37

x^2 - 16 x  + 64

It will touch the x axis  when y  = 0

So

x^2  - 16x  + 64  = 0     factor

(x - 8)^2  =  0      take the square root of both sides

x - 8  = 0

x  =  8

38

8x*2 + 10x  - 2   = 0

x  =   ( -10 ±√ [ 10^2  - 4(8)(-2) ]  ) /  [ 2*8 ]

x  =  ( -10±√ [ 100 + 64])  / (16)

x  = (-10 ±√164) / 16

x  =  (-10 + √164 ) / 16

x = 0.18

f(x) =  (x^2+4x-12) / ( x-2 )

This will be undefined (have a hole )  for the x value  that gives the form  0/0

Factor the numerator

[(x + 6) (x - 2) ] / (x - 2)

Nothe that when  = 2, we will have the form  0/0

So.....to find the y coordinate of the hole,  cancel the ( x - 2) factors and sub  2  into  x + 6

So.....the coordinate of the  "hole"  is    (2 , 2 + 6)  =  (2,8)

R=8pounds

Transformation Rule  =  ( x + 6, y - 8)

Scale factor  =   Radis of circle 2  / Radius of circle 1   =  9 / 6   =   3/2  =  1.5

3

The Mean  is  111.16

The SD  is  32.8

The minimum value is 69

The max value is 158

So  

Two SDs  above the mean  is   111.16 + 2(32.8)   = 176.76

Two SDs  below the mean is  111.16  - 2(32.8)  = 45.56

So  all the values fall within 2SDs  from the mean

4.

I think this is correct NSS

The mean  is 28.3

The SD is  9.93

So....two SDs above the mean  is 28.3 * 2(9.3)  = 46.9

And two SDs below the mean is  28.3  - 2(9.3)  =  9.7

So...

16  is the minimum value   and 40  is the max value

So...all   values fall within  2 SDs  from the mean

Sincs RS  =  5.....then PQ  also equals 5 since RS  is parallel to PQ

So using the perimeter.... PS  + QR  =  24 - 5 -  5  =   14

And since PS = QR  then 

2OR  = 14      divide both sides by 2

QR  = 7

And the area of  PQRS  = ( Base * Height)   = (QR * Height)

So

28  =  7 * Height       divide both sides by 7

4   =  Height    =  ST

And by the Pythagorean Theorem

RT  = sqrt  [ RS^2  - ST^2]  =   sqrt [ 5^2  - 4^2]  = sqrt [ 25 - 16 ] = sqrt (9)  =   3

So....the base  of QOST  = QT =  QR + RT   =  7 + 3   =  10

So  the area of QOST  =  

QT  * ST  =

10 * 4   =

40 units^2

y  =  3 + 4x^2  -  x^3

The derivative of this is the slope at any point, a

So

y'  =  0 + 8x  - 3x^2        simplify

y'  = -3x^2 + 8x

so...the slpoe at x  = a   is

-3(a)^2   + 8a

2

Mean   =  [  53 + 51  + 48 + 49 + 37 ]  / 5    = 47.6

Variance  =  [29.2 + 11.6 + 0.2 + 2 + 112.4 ]  / 5  = 31.1

SD =  sqrt (31.1)   =  5.6

First answer

1    

92    97   53  90   95    98

Mean = Sum of the Values  / Number of Values  = 

[ 92 + 97 + 53 + 90 + 95    + 98  ]  /   6    =   87. 5

Variance  =  

(92 - 87. 5)   =  4.5    ⇒ 4.5^2  ⇒  20.25

(97 - 87.5)  =  9.5 ⇒ 9.5^2  =  90.25

(53 - 87.5)  = -34.5  ⇒ (-34.5)^2   = 1190.25

(90 - 87. 5) = 2.5 ⇒ 2.5^2  = 6.25 

(95 - 87.5) = 7.5 ⇒ 7.5^2 ⇒ 56.25

(98 - 87.5) = 10.5 ⇒ 10.5^2 ⇒ 110.25

Add the values in the last column  =  1473.5

Take this value and divide it by the number of data values  = 6

1473.5 / 6   =   245.58

The standard deviation is the square root of this  = 15.7

Second answer 

Thanks so much!

We have  a weighted average here :

[ Number of vehicles  ]  / [ Number of households  ]  =

[ 3*0   +  9*1 + 10*2  + 2*3  + 1*4  ]  / [ 3 + 9 + 10 + 2 + 1  ]  =

[ 0 + 9 + 20 + 6 + 4  ]  / [ 25 ]   =

[ 39 ] /  [ 25 ]   =

1.56   =  1.6  venicles per household

Look at the diagram, ACG

The area between chord BC  and the edge of the top circle can be found as

Area of sector ABC  - area of triangle ABC =

(1/4)pi (4)^2  - (1/2)(4^2)sin (90°)  =

[ 4pi  - 8 ] units^2

And due to symmetry.....we would have 8 of these areas....so....the total area of the shaded regions is

8 ( 4pi  - 8  )   =

[ 32 pi  - 64]  units ^2