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3 years ago

4 over 7 divided by 13 over 28

2 answers:

6 0

$\bf \cfrac{4}{7}\div \cfrac{13}{28}\implies \cfrac{4}{~~\begin{matrix} 7\\[-0.7em]\cline{1-1}\\[-5pt]\end{matrix}~~ }\cdot \cfrac{\stackrel{4}{~~\begin{matrix} 28 \\[-0.7em]\cline{1-1}\\[-5pt]\end{matrix}~~}}{13}\implies \cfrac{16}{13}\implies 1\frac{3}{13}$

Galina-37 [17]3 years ago

5 0

Answer:

16/13

Step-by-step explanation:

Use a calculator lol

Can I have brainliest please

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Please answer the question!

galina1969 [7]

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5 moles of Oxygen => 2 moles of C2H2

? O2 => 1 mole of C2H2

1.0 mole C2H2×(5 moles O2/2 moles of C2H2) = 2.5 moles of O2

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2 years ago

Maria want to make a footstool in the shape of a cylinder, as show below. She wants to fill the footstool with foam and cover it

noname [10]

Answer:

She'll need 8143 cubic inches of foam and 1,809.6 square inches of fabric.

Step-by-step explanation:

Assuming you want to know how much foam and fabric she will need...

First the foam... so we need to determine the volume of that footstool. The Volume of a cylinder is given by:

V = π * r² * h

So, we plug in the numbers:

V = π * 12² * 18 = π * 144 * 18

V = 2,592 π = 8143 cubic inches.

Now for the fabric... we'll assume Maria wants to cover the side of the stool and the top, but not the bottom.

The side of the stool is basically a rectangle of width of 18 inches and a length of the circumference of the base of the stool. The circumference is given by: C = 2 π * r of course, so C = 24π = 75.14 inches.

So the lateral surface of the cylinder is:

LS = 18 * 75.14 = 1,357.2 sq inches.

Then we need to calculate the area of the top... which is easy:

A = π * r² = π * 12² = 144 π = 452.4 sq inches

So, to cover the lateral side of the footstool and its top, she needs to use:

TA = 1,357.2 + 452.4 = 1,809.6 sq inches of fabric.

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3 years ago

Read 2 more answers

Find the number of faces, edges, and vertices of the solid. Please help me with this problem!

sp2606 [1]

Answer:

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Step-by-step explanation:

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3 years ago

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nikklg [1K]

Answer:

The dimension of the larger bin is x and the smaller bin is $0.75x$ .

Step-by-step explanation:

Let the dimension of the larger bin is x.

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In order to find the dimension of the smaller bin multiply the dimension of the larger bin by 0.75

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3 years ago

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I think that the answer would be 1910 because it is less than 1911.

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4 years ago