V= pi x r^2 x h
V/(pi x h)=r^2
square root of [V/(pixh)]=r
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➷ A variable is an unknown number that is represented by a letter, for example, x.
It is usually found in an algebraic expression.
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TROLLER
A- solve bracket first so
3/4 + 2/9 +5/12 then multiply by 3.6 = 5
do the same with the rest and u get
A=5
B=1
C=15
D=3
please mark brainliest