Your equation is
0.194*x = 43400,
where x is the unknown total number of registered doctors, which is under the question.
Solve the equation to get the answer:
x = 43400/0.194 = 223711 registered doctors.
See attached picture for answer
Parameterize
by

with
and
. Take a normal vector to
,

which has norm

Then the integral of
over
is


Answer:
10
Step-by-step explanation:
Plug in 0 where x is
See image below:)
Anything greater than 4 but less than 9