0.20km is the answer.
Explanation: 1ft = 30.48cm
The answer is x=6. 11-3x6=-7
"<span>Arc cd 1\4 of the circumstance of a circle. What is the radian measure of the central angle." Better: 'The arc CD is 1/4 the circumference of a circle. What is the radian measure of the central angle?'
That would be 1/4 of 2pi, or pi/2 (answer)</span>