Your revenue is $32,456. Your gross margin is $23,487. Your operating expenses are $8,123. Your profit is: a) $8,969 b) $24,333
2 answers:
You might be interested in
Presumably you should be doing this using calculus methods, namely computing the surface integral along 
.
But since describes a sphere, we can simply recall that the surface area of a sphere of radius 
is 
.
In calculus terms, we would first find an expression for the surface element, which is given by
So the area of the surface is
as expected.
But since
In calculus terms, we would first find an expression for the surface element, which is given by
So the area of the surface is
as expected.