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Oliga [24]
3 years ago
9

Please answer this !! I really need help

Mathematics
1 answer:
lukranit [14]3 years ago
6 0

2√5 + 3√5 - √5

= √5(2 + 3 - 1)

= 4√5

Answer is the last one

4√5

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Please help I don’t understand how to solve this !
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Answer:

x = 30

Step-by-step explanation:

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A manufacturing process makes rods that vary slightly in length but follow a normal distribution with mean length 25 cm and stan
Galina-37 [17]

Answer:

The probability of randomly selecting a rod that is shorter than 22 cm

P(X<22)  = 0.1251

Step-by-step explanation:

<u><em>Step(i):</em></u>-

Given mean of the Population = 25cm

Given standard deviation of the Population = 2.60

Let 'x' be the random variable in normal distribution

Given x=22

Z = \frac{x-mean }{S.D} = \frac{22-25}{2.60} = -1.15

<u><em>Step(ii):</em></u>-

The probability of randomly selecting a rod that is shorter than 22 cm

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             = 1-P(Z>1.15)

             =  1-( 0.5+A(1.15)

             =  0.5 - A(1.15)

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             = 0.1251

The probability of randomly selecting a rod that is shorter than 22 cm

P(X<22)  = 0.1251

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3 years ago
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Answer:

25/29

Step-by-step explanation:

see the attached picture.

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