You can round 396 to 400 and 71 to 70. then you just multiply them and get 28,000. :))
Answer:

the coefficient c is -27
Step-by-step explanation:
hello

hope this helps
I’m pretty sure the answer is C. I’m not entirely sure.
Explanation :
What you would do is you take the area of the rectangle and subtract the area of the triangle
The area of a rectangle is Length * Width