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just olya [345]
3 years ago
10

Jamie says the value of the expression 1.34

Mathematics
1 answer:
Lubov Fominskaja [6]3 years ago
3 0
Okay what is next then?
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A major television manufacturer has determined that its 44 inch screens have a mean service life that can be modeled by a normal
Neko [114]

Answer:

P(5

And we can find this probability with thie difference:

P(-2

And in order to find these probabilities we can find tables for the normal standard distribution, excel or a calculator.  

P(-2

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

Solution to the problem

Let X the random variable that represent the heights of a population, and for this case we know the distribution for X is given by:

X \sim N(6,0.5)  

Where \mu=6 and \sigma=0.5

We are interested on this probability

P(5

And the best way to solve this problem is using the normal standard distribution and the z score given by:

z=\frac{x-\mu}{\sigma}

If we apply this formula to our probability we got this:

P(5

And we can find this probability with thie difference:

P(-2

And in order to find these probabilities we can find tables for the normal standard distribution, excel or a calculator.  

P(-2

5 0
3 years ago
Find the area of the triangle. <br><br> Area= <br> (Simplify your answer)
gladu [14]

Answer:

38.9?? or 40??

Step-by-step explanation:

you  put the base and the height together then multiply it by 2

3 0
3 years ago
PLEASE PLEASE HELP!!!
natka813 [3]

Answer:

398,765 books were sold

Step-by-step explanation:

How to get the answer:

1) Identify the given

  32,300 is percentage

  8.1 % is rate

  base (b) is missing

2) Solve

   b= p/r

   b= 32,300 / 8.1% or 0.081

   b= 398,765

3) Check

   398,765 x 8.1% = 32,299.97 or 32,300

5 0
3 years ago
HELP EASY ASAP MULTIPLE CHOICE
Rudik [331]

Answer:

It's the first one 18/3 =6

Step-by-step explanation:

This is the only answer that has all integers or whole numbers. Hope this helps!

5 0
3 years ago
Read 2 more answers
What is 7 to the power of 8 times seven to the power of -4
Elden [556K]
7 to the power of 8 is 5764801 and 7 to the power of -4 is 0.00041649312 so these timed equals

2400.99995<span> </span>
3 0
3 years ago
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