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marta [7]
3 years ago
10

Here is a balanced hanger:

Mathematics
1 answer:
Slav-nsk [51]3 years ago
3 0

I don't know exactly i think its either 3 grams or 7 grams or 2 1/2 grams

sorry if its wrong

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Use differentials to estimate the amount of paint needed to apply a coat of paint 0.07 cm thick to a hemispherical dome with dia
Mademuasel [1]

An hemispherical dome is half a sphere. If the diameter is 60 m, then the radius is 30 m.

We can use differentials to solve this problem because we are adding a thin layer to the original dome, so the volume of the dome in increased by a differential of itself.

This differential volume that the dome is increased is equal to the volume of the coat of paint.

The volume of the dome can be written as:

\begin{gathered} V=\frac{4\pi}{3}r^3 \\ \frac{dV}{dr}=\frac{4\pi}{3}\cdot3r^2\Rightarrow dV=\frac{4\pi}{3}\cdot3r^2\cdot dr=4\pi r^2\cdot dr \end{gathered}

Now, we can calculate dV as:

\begin{gathered} dV=4\pi r^2\cdot dr \\ dV\approx4\cdot3.14\cdot(30m)^2\cdot0.07\operatorname{cm}\cdot\frac{1m}{100\operatorname{cm}} \\ dV\approx12.57\cdot900m^2\cdot0.0007m \\ dV\approx7.92m^3 \end{gathered}

Answer: the paint needed for this coat is approximately 7.92 m^3

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1 year ago
A gardener plants a bed of flowers such that he plants twenty day lilies in the first row, twenty-six day lilies in the second r
dlinn [17]
He planted 92 of those because 12 times 6 is 72 and 72 plus 20 is 92 therefore the answer is 92
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The table shows the steps for solving the given inequality for x. −2(3−2x)
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Answer:

3x = 4-x "hope this helps"

Step-by-step explanation:

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3 years ago
HURRYYYY PLSSSSS IM TIMED
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A line passes through the points A(n,4) and B(6,8) and is parallel to y=2x-5. What is the value of n?​
Lady_Fox [76]

The slope of <em>y</em> = 2<em>x</em> - 5 is 2. Parallel lines have the same slope, so the slope of the line through the given points <em>A</em> and <em>B</em> is also 2. This means

(8 - 4) / (6 - <em>n</em>) = 2

Solve for <em>n</em> :

4 / (6 - <em>n</em>) = 2

4/2 = 6 - <em>n</em>

2 = 6 - <em>n</em>

<em>n</em> = 6 - 2

<em>n</em> = 4

4 0
3 years ago
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