Find the circumference or distance around a circus ring (circle) with a diameter of 100 feel. use 3.14 for pi

Use Formula C= pi(d) so that would be 3.14 x 100 = 314

2 x^2 -3x+p

sum of roots = 3/2

let other root be x

3+ x = 3/2

x= 3/2 - 3 = -3/2

product of roots = p/2

3× -3/2 = p/2

-9 = p

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its c or d   take a lucky guess my dude