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Setler [38]
3 years ago
6

area of ceiling is 256square feet what is the length of wooded border that I will need to completely surround the square ceiling

Mathematics
1 answer:
weeeeeb [17]3 years ago
8 0
The perimeter of the wooded border would be 64. In order to convert the area of a square into its perimeter, you must find the square root of the area and then multiply that number by 4. 

work:
square root of 256 = 16
16 x 4 = 64

good luck
x
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1. A farmer divided a field into 1-foot by 1-foot sections and tested soil samples from 32 randomly selected sections in the fie
Ad libitum [116K]
Part A

Answers:
Mean = 5.7
Standard Deviation = 0.046

-----------------------

The mean is given to us, which was 5.7, so there's no need to do any work there.

To get the standard deviation of the sample distribution, we divide the given standard deviation s = 0.26 by the square root of the sample size n = 32
So, we get s/sqrt(n) = 0.26/sqrt(32) = 0.0459619 which rounds to 0.046

================================================

Part B

The 95% confidence interval is roughly (3.73, 7.67)
The margin of error expression is z*s/sqrt(n)
The interpretation is that if we generated 100 confidence intervals, then roughly 95% of them will have the mean between 3.73 and 7.67

-----------------------

At 95% confidence, the critical value is z = 1.96 approximately

ME = margin of error
ME = z*s/sqrt(n)
ME = 1.96*5.7/sqrt(32)
ME = 1.974949
The margin of error is roughly 1.974949

The lower and upper boundaries (L and U respectively) are:
L = xbar-ME
L = 5.7-1.974949
L = 3.725051
L = 3.73
and
U = xbar+ME
U = 5.7+1.974949
U = 7.674949
U = 7.67

================================================

Part C

Confidence interval is (5.99, 6.21)
Margin of Error expression is z*s/sqrt(n)
If we generate 100 intervals, then roughly 95 of them will have the mean between 5.99 and 6.21. We are 95% confident that the mean is between those values.

-----------------------

At 95% confidence, the critical value is z = 1.96 approximately

ME = margin of error
ME = z*s/sqrt(n)
ME = 1.96*0.34/sqrt(34)
ME = 0.114286657
The margin of error is roughly 0.114286657

L = lower limit
L = xbar-ME
L = 6.1-0.114286657
L = 5.985713343
L = 5.99

U = upper limit
U = xbar+ME
U = 6.1+0.114286657
U = 6.214286657
U = 6.21
5 0
3 years ago
The temperature of a cup of coffee decreased 26% in the first 5 minutes after it was made. The coffee starts at 190°F. What temp
OLEGan [10]

Answer:

it is 140.5 degrees after 5 min

3 0
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Answer:

2 meters an haur

Step-by-step explanation:

12 haurs= 6 meters

1 haur =. x

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how many square feet of paper do you need to cover a cube with a side 10 in. long? Round your answer to two decimal places
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The answer should be A.=4.17 sq ft
8 0
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Read 2 more answers
Write a function for the thickness of folding a piece of paper that is 0.2 millimeters thick. Let t be the thickness of the fold
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T(n) = 0.2n

Hope I helped!

Let me know if you need anything else!

~ Zoe
6 0
3 years ago
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