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3 years ago

Please help. Will give brainliest.

Mathematics

1 answer:

Anastaziya [24]3 years ago

8 0

Answer:

radius [r]=3in

length of bold part of circle=(360-40°)/360×2πr

=8/9×2×π×3=16.755

we have

x²-2=2-y²

x²+y²=4..........(1)

comparing above equation with

(x-h)²+(y-k)²=r²

we get

centre(h,k}=(0,0)

radius [r]=2 units

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Answer:

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Step-by-step explanation:

The question is incomplete:

"Find a 95% confidence interval on the difference of the towels mean absorbency produced by the two processes. Assumed that the standard deviations are estimated from the data. Round to two decimals places."

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The degrees of freedom are:

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The t-value for a 95% confidence interval and 12 degrees of freedom is t=±2.179.

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