Use the basic formula v=nr^2h to get the answers
180n or 565.2
Hope this helps! :D
Answer:
9
Step-by-step explanation:
7r+18=r²
r²-7r-18=0
factorizing
r²+2r-9r-18=0
r(r+2)-9(r+2=0
(r-9)(r+2)=0
r-9=0
r=9
check
(r²)=(9*9)=81
7r+18=7(9) + 8=81
Area =(1/2)(sum of parallel bases) x (height)
A= (1/2)(b1 + b2)x h
A= (1/2)(10 + 8)(6)
A=(1/2)(18)(6)
A= 18 x 3
A= 54 sq. inch
The answer is B
