The answer is D!
If helped mark me the brainiest!!
Use the divergence theorem. Let

be the cylindrical region, then

(where

denotes the unit normal vector to

, but we don't need to worry about it now)
We have


For the solid

with boundary

, we can set up the following volume integral in cylindrical coordinates for ease:



Hello,
y=k/x
if x=6 then y=42==>42=k/6==>k=252
if x=9 then y=252/9=28
So in order to subtract you need a common denominator. So you multiply 3/4 by 7 and 1/7 by 4 and get 7/28 - 21/28 then you subtract and get - 14/28 or -1/2 if you want to simplify it.
Answer:
The simplified expression in the exponential form will be: 
Step-by-step explanation:
Given the expression

simplifying the expression and writing the answer in exponential form


so the expression becomes

∵ 
Therefore, the simplified expression in the exponential form will be: 