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lisabon 2012 [21]
3 years ago
9

A set of biology exam scores are normally distributed with a mean of 70 points and a standard deviation of 6

Mathematics
2 answers:
Maslowich3 years ago
8 0

Answer:

To two decimal places, we have 0.93

Step-by-step explanation:

We start by calculating the z-score

Mathematically;

z-score = (x-mean)/SD

here, x = 61

mean = 70 and SD = 6

So, we have ;

z-score = (61-70)/6

z-score = -9/6 = -1.5

So we want to calculate the probability of z > -1.5

We use the standard normal distribution table for this

The answer here according to the table is 0.93319

To 2 decimal places, this is 0.93

bezimeni [28]3 years ago
7 0

Answer:

.69

Step-by-step explanation:

Normalcdf (lower: 0, upper: 73, mean: 70, S.D.: 6) = .691462 --> .69

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Paha777 [63]

Answer:

Step-by-step explanation: First Whats 9+10 Its 21 soooo yea 2nd u get smart 3rd Be a GIGA CHAD

8 0
1 year ago
How do you solve 4y-8x=12
77julia77 [94]
You have to think about what y and x can be equal to for you to get 12. (Hint: y is going to be a bigger number than x)


Ex: 3y-5x=5

Think: 3 x 10(y) - 5 x 5(x)= 5
So, y would be 10 and x would be 5.
8 0
3 years ago
Helpp !! I Dont Understand This !
makvit [3.9K]
How to solve shaded regions on a trapezoid is simple.
First find the area of the whole trapezoid, or W but it already gives us that as 21.66 in squared.
Next, find the area of the non shaded region, or NS.
3.8*4.6=17.48 in
Lastly, subtract the NS from the W.
21.66 -17.48 = 
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W= 21.66 in squared.
S= 4.18 in squared.
 
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4 0
4 years ago
Give the equation for each of the following statements.
emmasim [6.3K]

Answer:

Step-by-step explanation:

1. Y varies jointly as R and T

Y = k*R*T

Y = kRT

Where,

k = constant of proportionality

2. B is directly proportional to the square of A and inversely proportional to the cube of C.​

B = k(A²) / C³

B = kA²/C³

Where,

k = constant of proportionality

4 0
3 years ago
Solve by elimination <br> 3x+2y=19<br> -9x+8y=-29
Alja [10]

Step-by-step explanation:

(3x + 2y =19)(3)

-9x + 8y =-29

9x + 6y = 57 <em><u>NOTE</u></em><em><u>:</u></em> we cross here 9x in first

-9x + 8y = -29 we cross here - 9x in second

Since 9x and - 9x are opposite

___________

6y +8y = 57 - 29

14y = 28

Y=28/14

Y=2

Replace y in second equation of this system:

-9x + 8y = - 29

-9x +8(2)= - 29

-9x + 16 = - 29

-9x = -29 - 16

-9x = - 45

X= -45/-9

X=5

Hope this helps..

4 0
3 years ago
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