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2 years ago

The future population of a small european country of 14 million people

Mathematics

1 answer:

inn [45]2 years ago

4 0

Answer:

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Step-by-step explanation:

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Cassidy places 49 stamps on each of 8 albums pages how many stamps does she place?

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Cassidy places 392 stamps

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2 years ago

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Think about the expression (x-8)(x+4)

Softa [21]

Answer:

x*x +4*x-8*x -8*4

x^2+4x-8x-32

x^2-4x-32

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2 years ago

The friendly old woman sold 38 long-

dem82 [27]

Answer:

Step-by-step eWrite 2.9 as

2.9

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2 years ago

After being treated with chemotherapy, the radius of the tumor decreased by 23%. What is the corresponding percentage decrease i

Crazy boy [7]

Answer:

The volume of the tumor experimented a decrease of 54.34 percent.

Step-by-step explanation:

Let suppose that tumor has an spherical geometry, whose volume ( $V$ ) is calculated by:

$V = \frac{4\pi}{3}\cdot R^{3}$

Where $R$ is the radius of the tumor.

The percentage decrease in the volume of the tumor ( $\%V$ ) is expressed by:

$\%V = \frac{\Delta V}{V_{o}} \times 100\,\%$

Where:

$\Delta V$ - Absolute decrease in the volume of the tumor.

$V_{o}$ - Initial volume of the tumor.

The absolute decrease in the volume of the tumor is:

$\Delta V = V_{o}-V_{f}$

$\Delta V = \frac{4\pi}{3}\cdot (R_{f}^{3}-R_{o}^{3})$

The percentage decrease is finally simplified:

$\%V = \left[1-\left(\frac{R_{f}}{R_{o}}\right)^{3} \right]\times 100\,\%$

Given that $R_{o} = R$ and $R_{f} = 0.77\cdot R$ , the percentage decrease in the volume of tumor is:

$\%V = \left[1-\left(\frac{0.77\cdot R}{R}\right)^{3} \right]\times 100\,\%$

$\%V = 54.34\,\%$

The volume of the tumor experimented a decrease of 54.34 percent.

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2 years ago

Please answer this qwq

balu736 [363]

Answer:

Step-by-step explanation:

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