With this question. will mark brainliest! 5 star rating+ !

all possible roots:

+-1 , +-1/2, +-2, +-4, +- 5, +- 5/2, +- 10, and +- 20

put in order 

+-1/2, +-1 , +-2, +-5/2, +-4, +- 5, , +- 10, and +- 20

answer is 

C. +-1/2, +-1 , +-2, +-5/2, +-4, +- 5, , +- 10, and +- 20

and 

C. 3 solutions

... i also solved on the other post..

solutions: -5/2, -2  and 2

i leave the calculator work to you.

7. diameter 4 miles, circumference 4π miles

8. radius 0.2 miles, circumference 0.4π miles

[this is a bad problem because the actual radius of a car on the track is less than 0.2 miles so the answer is less than 0.4π miles]

9. radius 6 feet, circumference 12π feet

10. diameter 14 cm, circumference 14π cm

11. diameter 4.8 feet, circumference 4.8π feet

start with a line segment pq that we will copy. mark a point r that will be one endpoint of the new line segment. set the compasses' point on the point p of the line segment to be copied. adjust the compasses' width to the point q. the compasses' width is now equal to the length of the line segment pq.

step-by-step explanation: