0.56 4 and below round it down, 5 and above round it up.
I think it’s b yes it’s right
Set the length of the base as x, the two equal sides are then 4x each, so the perimeter is x+4x+4x=9x
I'm guessing it is C because after you solve for n (you need to multiply the five over to isolate n), you get 20.
