I believe since the definition of perimeter is adding the lengths of all three sides of the angles the, width of the rectangle would be 5, and the length of the rectangle would be 10.
10
+10
-------
20
+5
------
25
+5
------
30
And that is you answer, yay!
.05 is equal to 5%
So for every dollar the mark up is .05cents
So if you times $81 by .05 this will give you the mark up because each of the 81$ needs .05 added to it.
So $4.05 Is the mark up
And
The cost would be markup and original added together
Answer: i dunno
Step-by-step explanation: srry
What is this it’s so hard
The answer is the second one