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Bond [772]
2 years ago
7

Four runners are training to compete as a team in a long race. At today’s practice, noah ran 5.124 miles, almirante ran 6.35 mil

es, jayla ran 7.42 miles, and diego ran 8.646. How much total did they run
Mathematics
1 answer:
natita [175]2 years ago
4 0
5.124+6.35+7.42+8.646=27.54 miles.
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Quality control studies for Speedy Jet Computer Printers show the lifetime of the printer follows a normal distribution with mea
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Answer:

About 3 years Speedy Jet printers be guaranteed.

Step-by-step explanation:

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If the company wishes to replace no more than 10% of the printers.

To find : How long should Speedy Jet printers be guaranteed ?

Solution :

Using Z- table,  

Z value corresponding to 10% or 0.10 = -1.28.

Applying z-score formula,

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

The value of x is given by,

x=(z\times \sigma)+\mu

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x=(-1.28\times 0.78)+4

x=-0.9984+4

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Answer:

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Step-by-step explanation:

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