I believe she would need to stain 548 inches of the surface.
Excluding the top and bottom, you are left with two panels that are 10 by 7.4, and two panels that are10 by 20, so
10•7.4= 74•2 =148
10•20= 200•2 =400
148 + 400= 548
Please correct me if I am wrong, have a good day!
-3= 6(-1) + b
-3= -6+b
3=b
B is 3
4 is a whole number
Divide 3 with 11
3/11 = 0.27 (rounded)
4 + 0.27 = 4.27
4.27 is your answer
hope this helps
If a whole number is specified before the decimal point so, five point two or 5.2 would be 5 2/10. The decimal point indicates that it's a mixed number.