Posted by kyle on Wednesday, July 9, 2014 at 10:33pm.
The radius of one sphere is twice as great as the radius of a second sphere.
Find the ratio of their surface areas.

math  Steve, Wednesday, July 9, 2014 at 10:37pm
4π(2r)^2 / 4πr^2 = 4
the square of the radius ratio

math  kyle, Wednesday, July 9, 2014 at 10:39pm
Find the surface area of an orange with a 3'' radius.

math  Steve, Wednesday, July 9, 2014 at 11:53pm
The formula is above. Plug in r=3.
We will assume a smooth, rather than a dimpled, surface :)
Answer This Question
Related Questions
 college physics  Two solid spheres A and B are made from the same material. The...
 college physics  Two solid spheres A and B are made from the same material. The...
 physics  Two solid spheres A and B are made from the same material. The mass of...
 math  A solid cone of height 12cm and radius 9 cm is recast into a solid sphere...
 PHYSICS  A 494 kg uniform solid sphere has a radius of 0.390 m. Find the ...
 Physics  Sphere 1 has surface area A1 and volume V1, and sphere 2 has surface ...
 calculus  3. The radius r of a sphere is increasing at a constant rate of 0.04 ...
 math  direct variation the surface area of a sphere varies directly as the ...
 physics 12  A hollow sphere us charged to 14uc .Find the potential(a) at its ...
 math  1. Sphere C(2,1,3), radius=7. T plane at (4,2,1)=? (a) 6x3y+2z=0 (b...
More Related Questions