What is the answer to the first one

(3x +1)(x+2)
Explanation:
Use the new AC method to factor trinomials
y=3x^2+7x+2=3 (x=p)(x+q)
Converted trinomial y'=x^2+7x+6=(x+p')(x+q')
Factor pair of (6)-(1,6).This sum is 7=b
Then p'=1 and q'=6.Back to y, p=1/3 and q=6/3=2
y=3 (x+1/3)(x+2)
=(3x+1)(x+2)

The answer is "a"radius = 12.7 unitsdiameter = radius × 212.7 units × 2 = 25.4 units

The length of what is left would be 1 1/2 feet long.