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Norma-Jean [14]
3 years ago
10

Factors that threaten the forests of North America include all of the following except

Geography
1 answer:
AnnZ [28]3 years ago
7 0

Answer:

NOT AN ANSWER... what are the answer choices?

Explanation:

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A metal sphere of radius 9 is melted and transformed into three identical spheres. b What is the ratio of the area of one of the
Romashka [77]

Answer:

25:52  the ratio of the area of one of these spheres to the area of the original sphere.

Explanation:

Radius of metal sphere ,R= 9

Volume of metallic sphere, V = \frac{4}{3}\pi R^3

Radius of small metal sphere = r

Volume of small sphere made form metal sphere = v

v=\frac{4}{3}\pi r^3

Volume of metallic sphere = Total volume of all 3 small spheres

V = 3v

\frac{4}{3}\p R^3=3\times \frac{4}{3}\p r^3

R=\sqrt[3]{3}r

Area of sphere = 4\pi (radius)^2

Area of metal sphere = A=4\pi R^2

Area of small metal sphere = A'=4\pi r^2

The ratio of the area of small spheres to the area of the original sphere:

\frac{A'}{A}=\frac{4\pi r^2}{4\pi R^2}=\frac{r^2}{R^2}

=\frac{r^2}{(\sqrt[3]{3}r)^2}=\frac{1}{(\sqrt[3]{3})^2}=\frac{1}{2.08}=\frac{25}{52}

25:52  the ratio of the area of one of these spheres to the area of the original sphere.

7 0
4 years ago
Question 14 of 42
murzikaleks [220]

Answer:

90

Explanation:

the answer is 90 because to find the area of a triangle you multiply base times height so 15×6 which gives you 90

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3 years ago
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