Answer:
a and c would also be perpendicular
Step-by-step explanation:
because a║b and b⊥c you would use the transitive property of equality.
I think that the answer is 45% because the sale started off with a 20% discount, but at the end they added another 25% to the sales. So since the sale already started off with 20%, you add 20%+25% which equals 45%.
