We know that
the area A of the circular cross section of the pipe is
A=pi*r²
D=20 cm------------- > r=D/2=20/2=10 cm
then
A=pi*10²=100*pi cm²
the answer is A=100*pi cm²
Answer:
n=7
Step-by-step explanation:
difference means subtraction so:
8n - 21= 35
8n=35+21
8n= 56
n= 56÷8
n=7
Answer:
How are angles used in graphic design?
Step-by-step explanation:
The angle marks the specific location at which a scene is placed. A scene may be shot from several camera angles.
Answer:
n=-1
Step-by-step explanation:
-13+n+5+6=5+4n-4
n-2=4n+1
-2=3n+1
-3=3n
-1=n
