Question

6 multiple choice 1 point evaluate the formula for the area of circle (a = pi r^{2}), if (r = 4 in). use (pi = 3.14). (a = 51 in^{2}) (a = 39.44 in^{2}) (a = 50.24 in^{2}) (a = 25.12 in^{2}) (a = 12.56 in^{2})

Explanation:

Step1: Substitute values into formula

$A = 3.14\times4^{2}$

Step2: Calculate $4^{2}$

$4^{2}=4\times4 = 16$

Step3: Multiply by $\pi$

$A=3.14\times16 = 50.24$

Answer:

$A = 50.24\ in^{2}$ (the third option)