Respuesta :

mersadeez2003
3 pails of plaster. I hope this helps
GabeTheGreat
240 inch^2 may should be #5 being that Length x width = A.
So 12 x 20... I hope cause I mean I shoot haven't seen a question like this in ages. But for a rectangle A = LW and for triangles A= 1/2 base x height.