Task instructions
Solve efficiently and select the best answer. Show your working in the practice workspace.
For radius 4, circumference equals:
A. 8π
B. 4π
C. 16π
D. 32π
Practice workspace
Write notes or your response
02:00
Reveal answer key / expected response
A — 8π
Suggested approach
Translate the statement into mathematical form; compute; check units and reasonableness.
Official-style scoring criteria
Correct result and sound quantitative reasoning.