Math, must show work

3.25

Step-by-step explanation:

First, you need to divide 13 by 4, = 3.25

Then draw a cube, label each side wall 1 wall 2, ect.

Color in each wall the same color (if you want too don't have too, just adds more to the diagram.)

Hope this helps! <3

No.

amount of paint needed for 1 coat = 750 ml

amount for 3 coats = 750 ml * 3 = 2250 ml

                                             =2.25 litre

hence we've 0.25 litre less

Step-by-step explanation: hope this helps