The area of a circle is approximately 3.14 times the radius squared. WHich of the following expressions is a correct way to write this , if the radius is 3x ?
A = 3.14 * 3x^2
I think it would be better to write it as 3.14 * (3x)^2 = 3.14 * 9x^2
To find the area of a circle, you need to use the formula A = πr^2, where A represents the area and r represents the radius. Given that the radius is 3x, we can substitute this value into the formula.
A = π(3x)^2
Now, we simplify this expression by squaring the radius:
A = π(9x^2)
Finally, we can write this expression in a correct way:
A = 9πx^2
Therefore, the correct expression to represent the area of a circle with a radius of 3x is 9πx^2.