Question

The surface area of a sphere is 19what is the sphere radius

Answer 1

Surface area of sphere = 194πr^2 =19πr^2=19/4
πr^2=4.75
r^2=4.75/3.14      (where π=3.14)r^2=1.51r= √1.51
r=1.22

I don't know about the unit though.