Correct answer is C.

Or check if f(0.2) = 0 to eliminate A and B.
Then check if f(-0.5) = 0 to eliminate D.
Answer:
a. -16 is the constant
b.if you expand the equation it would be x^2-16, and the constant is -16
367 cm sq
You find the area for all the shapes and then add it up
Triangle - 160cm
Square - 144cm
Trapezoid - 63
Forty-seven point three five eight.
I hope you like this answer, and have a good night and life! :D