Answer:
6.2
Step-by-step explanation:
A P E X
3.2 million
320 million divded by 10 is 1/10 of the population
D and b
they are 90° angles cause you can draw your line to make a 90° angle
PEMDAS
paranthesis exponents multiplication division addition subtraction
By Stokes' theorem,

where

is the circular boundary of the hemisphere

in the

-

plane. We can parameterize the boundary via the "standard" choice of polar coordinates, setting

where

. Then the line integral is


We can check this result by evaluating the equivalent surface integral. We have

and we can parameterize

by

so that

where

and

. Then,

as expected.