As an opportunity to respond to people who might disagree with your claim.
Answer:
Width (length of shorter side) = 3.5 cm.
Step-by-step explanation:
L = 8.5 cm
perimeter, P = 24 cm
2(L+W) = 24
substitute L = 8.5
2(8.5+W) = 24
8.5 + W = 24/2 = 12
W = 12 - 8.5 = 3.5 cm
THE SURFACE AREA IS 3220CM^2
The sum of f and 6 is simply f+6.
It is like this because f is a variable and we do not know its value.