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Tpy6a [65]
2 years ago
7

Marcie built a scale model of the tallest building in town with an antenna on top. The model stands 6 2/3 centimeters tall. The

main building is 3/4 of the height of the building including the antenna. How tall is the antenna in the model? Pls help this is due today and i am really stressed out.

Mathematics
2 answers:
snow_tiger [21]2 years ago
8 0
The answer is gonna be 1/2
marysya [2.9K]2 years ago
7 0

The answer is 1/2...........

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son4ous [18]
There is a relationship between confidence interval and standard deviation:
\theta=\overline{x} \pm \frac{z\sigma}{\sqrt{n}}
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Every confidence interval has associated z value. This can be found online.
We need to find the standard deviation first: 
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When we do all the calculations we find that:
\overline{x}=123.8\\ \sigma=11.84
Now we can find confidence intervals:
($90\%,z=1.645): \theta=123.8 \pm \frac{1.645\cdot 11.84}{\sqrt{15}}=123.8 \pm5.0\\($95\%,z=1.960): \theta=123.8 \pm \frac{1.960\cdot 11.84}{\sqrt{15}}=123.8 \pm 5.99\\ ($99\%,z=2.576): \theta=123.8 \pm \frac{2.576\cdot 11.84}{\sqrt{15}}=123.8 \pm 7.87\\
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Here is the link to the spreadsheet with standard deviation calculation:
https://docs.google.com/spreadsheets/d/1pnsJIrM_lmQKAGRJvduiHzjg9mYvLgpsCqCoGYvR5Us/edit?usp=sharing
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2 years ago
After painting his porch, Jamil has \dfrac14 4 1 ​ start fraction, 1, divided by, 4, end fractionof a can of paint remaining. Th
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The height of the smaller can would need to be 12.8 cm.

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We will use this as the volume of the smaller can.  Substituting this in along with the radius of the smaller can (using the same volume formula), we have:
1004.8 = 3.14(5²)h
1004.8 = 78.5h

Divide both sides by 78.5:
1004.8/78.5 = 78.5h/78.5
12.8 = h
5 0
1 year ago
Kourtney and Kayla are sisters who are taking the same classes this semester: MAT 003, CHM 131/3131A, and ACA 122. if kourtney e
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Answer: A.3.5

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In a particularly sunny month, Solaire's solar panels generated 110 percent as much power as expected.What fraction of the expec
vfiekz [6]

we are given

In a particularly sunny month, Solaire's solar panels generated 110 percent as much power as expected.

so, we need to change percent into fraction to get our value

we can write

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now, we can simplify it

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110%=\frac{11}{10}

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Solaire's solar panels generate \frac{11}{10} of the expected amount of power.............Answer

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2 years ago
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1 year ago
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