Final answer:
a. A circle with an 8-inch radius.The formula to find the area of a circle is A = πr². The area of a circle with an 8-inch radius is 64π square inches. The area of a circle with a 10-kilometer radius is 100π square kilometers.
Step-by-step explanation:
The correct answer is option a.
The formula to find the area of a circle is A = πr², where A is the area and r is the radius of the circle.
For a circle with an 8-inch radius, the area would be A = π(8)² = 64π square inches.
For a circle with a 10-kilometer radius, the area would be A = π(10)² = 100π square kilometers.
For a circle with a 14-yard diameter, the radius would be half of the diameter, so the radius is 7 yards. The area would be A = π(7)² = 49π square yards.
For a circle with a 22-centimeter diameter, the radius would be half of the diameter, so the radius is 11 centimeters. The area would be A = π(11)² = 121π square centimeters.