Answer:
[tex]\Large \boxed{\mathrm{20. \ 46 \ feet}} \\ \\ \\ \Large \boxed{\mathrm{21. \ 9 \ feet}}[/tex]
Step-by-step explanation:
The perimeter of a rectangle is the sum of all its sides.
[tex]\Rightarrow 15+8+15+8[/tex]
[tex]\Rightarrow 46[/tex]
The distance between the window and the foot of the bed is:
length of the room - length of the bed
[tex]\Rightarrow 15 - 6[/tex]
[tex]\Rightarrow 9[/tex]
