3 years ago

Hey guys i need this fast its due in 15 minutes and please show step by step process

Mathematics

1 answer:

dolphi86 [110]3 years ago

6 0

You can use a calculator for this if your teacher lets you to make it easier

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A poll found that a particular group of people read an average of 12.8 books per year. The pollsters are 99% confident that the

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Answer: $|x-12.8|\leq3.93$

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Given : A poll found that a particular group of people read an average of 12.8 books per year.

The pollsters are 99% confident that the result from this poll is off by fewer than 3.93 books from the actual average x.

The inequality to express this situation involving absolute value will be :-

$|x-12.8|\leq3.93\\\\\Rightarrow\ -3.93\leq x-12.8\leq3.93 \\\\\text{Add 12.8 on both sides , we get}\\\\\Rightarrow\ -3.93+12.8\leq x\leq3.93+12.8\\\\\text{Simplify}\\\\\Rightarrow\ 8.87\leq x\leq16.73$

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