we know that
the area of the rectangular banner is equal to

where
W is the wide of the banner
h is the height of the banner
in this problem


In the formula of the area solve for h

Substitute the values of W and A

therefore
the answer is
the height of the banner is 
A.) x (5 + x) = 5x + x^2
B.) 2 (5 + x) = 10 + 2x
The shadow of the tree is about 17.955 feet long.
The lesser of the numbers given are -16 because -16 is more negative.
Answer:
1/4 is the common ratio for the geometric sequence