It is irrational.
A = π r^2 = π[3/4 cm]^2 = 9π/16 cm^2
An irrational number (Pi in this case) multiplied by a rational number (9/4) gives an irrational number.
first you put this equation into y=mx+b form then you look at the slope of the equation. if both of the slopes are same then its parallel.
-8 * -4 = 32
Just multiply both numbers and negatives cancel
I have no idea what you are trying to say