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) $43.96 \mathrm {~cm} ^ { 2 }$

Question

Quizplus · Accepted Answer

The area of a circle is calculated using the formula $A = \pi r^2$. Substituting $\pi = 3.14$ and $r = 7$ cm, we get $A = 3.14 \times 7^2 = 3.14 \times 49 = 153.86 \mathrm{cm}^2$.

Solve the Problem πr2,\pi r ^ { 2 },πr2, , Where π Is an Irrational Number

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