One such polynomial might be

Another with the same roots would be
Answer:
f(5)=4
Step-by-step explanation:
f(5)=5_1=4
.....
Answer:
Diameter 16, radius 7, circumference 37.68, diameter 8
Step-by-step explanation:
Largest area will be in a circle with the largest radius. So let's find all radii.
d = 8, so r = 4;
r = 7;
circumference = 2pi*r = 37. 68, so r = 6
diameter 18, so r = 8
What exactly is it you need help with?