Variables are used in algebra and other branches of mathematis.
They are represented by letters. Usually ( but not necesserally) the letters at the end of the alphabet like x,y and z.
Answer:
Step-by-step explanation:
We are to integrate the function

over the area enclosed by the circle
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Convert into polar coordinates
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x=rcost and y = rsint
Since the lines are x=0 and y=x we find that t varies from 0 to pi/4

Double integral will become now
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(since variables are independent here)
Substitute for r and t
4 sin pi/4 -2 cospi/4
= 
Answer:
X angle
Step-by-step explanation:
Answer:
200(50) is for the original revenue, and (200 - 10(50 + 5)) is if they increase it once.