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Pavlova-9 [17]
3 years ago
8

Help I need it I’m almost done

Mathematics
1 answer:
sesenic [268]3 years ago
3 0

Answer:

E

Step-by-step explanation:

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Encontrar la Esperanza Matemática y Desviación Estándar del número de imperfecciones (y) en pizarra acrílica. (2 puntos) y 0 1 2
fredd [130]

Responder:

1,625; 0.8569

Explicación paso a paso:

y ___0 ____ 1 ____ 2 ____3

P (y) _1 / 8 ___ ¼ ___ ½ ____ 1/8

Valor esperado (E (x)): Σx * p (x)

= (0 * (1/8)) + (1 * (1/4)) + (2 * (1/2)) + (3 * (1/8)) = 1,625

La desviación estándar = sqrt (Var (x))

Var (X) = Σx²p (x) * E (x) ²

Var (X) = [(0 ^ 2 * (1/8)) + (1 ^ 2 * (1/4)) + (2 ^ 2 * (1/2)) + (3 ^ 2 * (1 / 8))] - 1.625²

Var (X) = (0 * (1/8)) + (1 * (1/4)) + (4 * (1/2)) + (9 * (1/8)) - 1.625 ^ 2

= 3.375 - 2.640625

= 0,734375

Desviación estándar = Sqrt (0,734375) = 0,8569

7 0
3 years ago
A circle has a diameter of 14.5cm
Alenkasestr [34]
The radius will be 7.25cm
The circumference will be about 45.55
The area will be about 165.13
7 0
3 years ago
Can someone help pls?
stira [4]

You have in total 5 pets and you have $22.00 To spend what you do is divide . Like this  

6 0
3 years ago
Read 2 more answers
If £2000 is placed into a bank account that pays 3% compound interest per year,
Likurg_2 [28]

Answer:

There would be 2,120 dollars in that account

5 0
3 years ago
Read 2 more answers
See attachment for problem
Effectus [21]

The liters in the tank when it is filled to a height of 3.70 is  5,580 liters

The liters that needs to be added to 100% capacity is 480 liters

<h3>What is the volume?</h3>

A right circular cone is a three dimensional object has a flat circular base that tapers to a vertex. The volume of a right circular cone is the amount of space in the right circular cone.

Volume of a cone = 1/3(πr²h)

Where:

  • π = pi = 3.14
  • r = radius
  • h = height

Volume of the right circular cone when its filled to a height of 3.70 = 1/3 x 3.14 x 3.70 x 1.20² = 5.58 m³

5.58 x 1000 = 5,580 liters

Volume of the right circular cone when it is full =  1/3 x 3.14 x 4 x 1.20² = 6.03  m³

6.03 x 1000 = 6030 liters

Liters that needs to be added to 100% capacity =  6030 liters - 5,580 liters  = 480 liters

To learn more about the volume of a cone, please check: brainly.com/question/13705125

#SPJ1

7 0
1 year ago
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