Answer:
x^2+10x+16
Step-by-step explanation:
Plug in the values
h=x+8
b=2x+4
A=1/2(2x+4)(x+8)
A=(x+2)(x+8)
FOIL: x^2+8x+2x+16
A=x^2+10x+16
2
Answer:4.5 x 2
4.5 x 2 = 9
Hope it helps
It will have 16 times more coverage than cell tower A.