What is the area of a circle with radius 7? (Use π ≈ 3.14)

What is the area of a circle with radius 7? (Use π ≈ 3.14)

• A. 152.0
• B. 154.1
• C. 150.5
• D. 153.86

Answer: (D)

To find the area of a circle, the formula to use is \( A = \pi r^2 \), where \( A \) is the area, \( \pi \) is a constant approximately equal to 3.14, and \( r \) is the radius of the circle. For this specific problem, the radius \( r \) is given as 7. Now, we can substitute the values into the formula: 1. Calculate \( r^2 \): \[ 7^2 = 49 \] 2. Multiply by \( \pi \): \[ A = 3.14 \times 49 \] 3. Performing the multiplication gives: \[ 3.14 \times 49 = 153.86 \] Thus, the area of the circle is approximately 153.86 square units. This accurately aligns with the value provided as the correct answer. This demonstrates the application of the formula for the area of a circle and confirms that the calculations are performed accurately with the given approximation of \( \pi \).

To find the area of a circle, the formula to use is ( A = \pi r^2 ), where ( A ) is the area, ( \pi ) is a constant approximately equal to 3.14, and ( r ) is the radius of the circle.

For this specific problem, the radius ( r ) is given as 7.

Now, we can substitute the values into the formula:

1. Calculate ( r^2 ):

[

7^2 = 49

]

2. Multiply by ( \pi ):

[

A = 3.14 \times 49

]

3. Performing the multiplication gives:

[

3.14 \times 49 = 153.86

]

Thus, the area of the circle is approximately 153.86 square units. This accurately aligns with the value provided as the correct answer. This demonstrates the application of the formula for the area of a circle and confirms that the calculations are performed accurately with the given approximation of ( \pi ).