Answer:
1.17
Step-by-step explanation:
5-(2.18+1.65)
P(x)=R(x)-C(x)
=(-0.5x²+800x-100)-(300x+250)
=-0.5x²+800x-100-300x-250
=-0.5x²+800x-300x-100-250
=-0.5x²+500x-350 (2)
The length of a diagonal is nine inches because it is the same length as the side length.