37 A circular pool has a diameter of 16 ft. What is the circumference of the pool?
A. 50.24 ft.
B. 40.86 ft.
C. 60.92 ft.
D. 30.28 ft.
38 A circular plate has a radius of 6 inches. What is the circumference of the plate?
A. 36.78 m
B. 38.76 m
C. 37.68 m
D. 38.67 m
39 A goat is tied to a mango tree in the backyard. The stretched rope is 3 meters long. Up to how many meters around the tree can the goat walk?
A. 9.42 m
B. 8.42 m
C. 7.42 m
D. 6.42 m​