circumference of circle: 2πr ("r" is the radius)
==========
I assume there's a plus sign missing above...
Convert to polar coordinates, using
Then the Jacobian is
Then
so the integral can be written as
Let
, so that
.
37.5*0.010=.375 (or press % button on calculator)
80*.375=30
T<=5 is the equation
(the <= is a less than or equal to sign.)
Answer:
c.) π/4
Step-by-step explanation:
Form the desired ratio and simplify:
A / B = circle area / square area
= (36π)/(144) = (π·36)/(4·36) = π/4 . . . . matches choice C