Asked by beautifulgirliam

use 1.9 as the radius for the sphere and answer the following
1-volume =
2-surface area=
3-ratio of the volume to surface area=

remember everything is with the sphere and radius 1.9 you have to use them to answer the volume, surface area, ratio of the volume to surface area

Answers

Answered by Reiny
Volume = (4/3)π (1.9)^3 = 28.7309...

SA = 4π (1.9)^2 = 45.36459...

ratio of V : SA = 28.7309.../45.36459...
= .63333...


in general , ratio of volume/SA
= (4/3)πr^3/(4πr^2)
= (1/3) r

using our values above
ratio vol. / SA
= (4/3)π(1.9)^3 / (4π (1.9)^2)
= (1/3)(1.9)
= 19/30
= .63333... , same as above
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