When the radius r of a sphere increases with time t, the change in area dA is dt Оа. 4 3 O b. dr 8n r dt dr 4r r- dt d. 4 T r² .2 dr | dt 3.

Elementary Geometry For College Students, 7e
7th Edition
ISBN:9781337614085
Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.
Chapter10: Analytic Geometry
Section10.6: The Three-dimensional Coordinate System
Problem 40E: For the sphers x-12+y+22+z-42=36 and x2+y2+z2=64, find the ratio of their a surface areas. b...
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When the radius r of a sphere increases with time t, the change in area
dA
is
dt
Оа. 4
3
O b.
dr
8n r
dt
dr
4r r -
dt
d.
4
T r²
.2 dr
|
dt
3.
Transcribed Image Text:When the radius r of a sphere increases with time t, the change in area dA is dt Оа. 4 3 O b. dr 8n r dt dr 4r r - dt d. 4 T r² .2 dr | dt 3.
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