Solve the Problem $$\pi r ^ { 2 },$$ , Where π Is an Irrational Number

Multiple Choice

Solve the problem.
-The area of a circle of radius r is given by the polynomialal $$\pi r ^ { 2 },$$ , where π is an irrational number. Use 3.14 as an approximation of $\pi ,$ and find the area of a circle with radius 7 cm.

A) $147 \mathrm {~cm} ^ { 2 }$
B) $21.98 \mathrm {~cm} ^ { 2 }$
C) $153.86 \mathrm {~cm} ^ { 2 }$
D) $43.96 \mathrm {~cm} ^ { 2 }$