Hi there....
-8f > 56
Divide both sides by -8
-8f/-8 > 56/-8
f < -7
The correct option is : B
we can use formula


now, we can cancel terms
and then we can simplify it



now, we can simplify it
and we get
...........Answer
Radian measure is given by dividing the length of an arc by the radius of a given circle. Such that an arc that subtends an angle of 1 radian to the center of a circle is equivalent to the radius of the circle.
Therefore; θ = s/r where θ is the angle subtended in radians, s is the length of the arc and r is the radius of the circle.
Hence; r = s/θ
= 12π ÷ (4π/7)
= 12 × (7/4)
= 21 inches