What is the area of a circle that has a radius of 15 inches? Use 3.14 for .
A. 47.1 inches squared
B. 706.5 inches squared
C. 23.55 inches squared
D. 94. 2 inches squared
B. 706.5 inches squared
The formula to calculate the area of a circle is A = πr^2, where A is the area, π is 3.14, and r is the radius of the circle.
Plugging in the values:
A = 3.14 * 15^2
A = 3.14 * 225
A = 706.5
Therefore, the area of a circle with a radius of 15 inches is 706.5 inches squared.
Radius = 4 Diameter= 16 Area= 78.5 Circumference 12.56
Your calculations appear to be incorrect. Let's correct them:
Given:
Radius = 4 inches
Diameter = 16 inches
Area = 78.5 square inches
Circumference = 12.56 inches
We can verify these calculations using the formulas for the area and circumference of a circle:
1. Area of a circle:
A = πr^2
A = 3.14 * 4^2
A = 3.14 * 16
A = 50.24 square inches
Therefore, the correct area of a circle with a radius of 4 inches is 50.24 square inches, not 78.5 square inches as previously mentioned.
2. Circumference of a circle:
C = 2πr
C = 2 * 3.14 * 4
C = 25.12 inches
The correct circumference of a circle with a radius of 4 inches is 25.12 inches, not 12.56 inches as previously mentioned.
Please double-check your calculations for accuracy.