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3 years ago

24 x 0.17 lol help pls

Mathematics

1 answer:

Maurinko [17]3 years ago

6 0

24 x 0.17 equals 4.08 to be the answer

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Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.3. (Round your ans

Maurinko [17]

Answer:

0.0039 is the probability that the sample mean hardness for a random sample of 12 pins is at least 51.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 50

Standard Deviation, σ = 1.3

Sample size, n = 12

We are given that the distribution of hardness of pins is a bell shaped distribution that is a normal distribution.

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

Standard error due to sampling =

$=\dfrac{\sigma}{\sqrt{n}} = \dfrac{1.3}{\sqrt{12}} = 0.3753$

P(sample mean hardness for a random sample of 12 pins is at least 51)

$P( x \geq 51) = P( z \geq \displaystyle\frac{51 - 50}{0.3753}) = P(z \geq 2.6645)$

$= 1 - P(z < 2.6645)$

Calculation the value from standard normal z table, we have,

$P(x \geq 51) = 1 - 0.9961= 0.0039$

0.0039 is the probability that the sample mean hardness for a random sample of 12 pins is at least 51.

3 0

3 years ago

How many cubic feet of oil does the drum hold?

Ad libitum [116K]

0 I think hope it’s right

8 0

3 years ago

The distance between Daytona Beach and Tallahassee is about 143,000 m. How many kilometers is this?

worty [1.4K]

Answer:

There are 212.89 miles from Tallahassee to Daytona Beach in southeast direction and 251 miles (403.95 kilometers) .

4 0

3 years ago

Show work ! please !!!!!!

Law Incorporation [45]

Sin A = opp/hyp = 4/5

Cos A = adj/hyp = 3/5

Tan A = opp/adj = 4/3

Cos 27 = 0.8910065... --> 0.89

You can just plug that into your graphing calculator, just make sure the degree mode is on.

3 0

3 years ago

A zookeeper predicted the weight of a new baby elephant to be 230 pounds when I was born the elephant actually weigh 262 pounds

insens350 [35]

Answer:

13.9%

Step-by-step explanation:

Given data

Expected weight = 230 pounds

Actual weight= 262 pounds

Required

The percent error

Error= Actaul- expected/ expected *100

Error= 262-230/230*100

Error=32/230*100

Error=0.139*100

Error=13.9%

Hence the error is 13.9%

5 0

3 years ago