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anonymous
 5 years ago
can somebody help me with ration please
anonymous
 5 years ago
can somebody help me with ration please

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anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0The celestial sphere shown at right has radius 9 inches. The planet in the sphere’s center has radius 3 inches. What is the ratio of the volume of the planet to the volume of the celestial sphere? What is the ratio of the surface area of the planet to the surface area of the celestial sphere?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0So you'll need to put the surface area of the one, over the other, and same for volume. I'm assuming you have/know the formula for the surface area or volume of a sphere..

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0you mean 4/3pi3 right

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0\[V = \frac{4}{3}\pi r^3\] \[A = 4\pi r^2\]

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0So the ratios will be \[\frac{V_3}{V_9} \text{ and } \frac{A_3}{A_9}\]

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0for 9 is 972pi and 324pi and for 3 36pi and 36pi

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0You need to divide them

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0\[Ratio_{volume} = \frac{324\pi}{972\pi}\]

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Hrm.. I think your original numbers are problematic... You should have.. \[\frac{\frac{4}{3}\pi 3^3}{\frac{4}{3}\pi 9^3} = \frac{3^3}{(3^2)^3} = \frac{3^3}{3^6} = \frac{1}{3^3} = \frac{1}{27}\]

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0but now i need ratio for SA

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0but with the surface area formula
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