Questions: The radius of a circle is 3.5 inches. What is the area of the circle? i=3.14 3.5 sq.inches 21 sq.inches 35.45 sq.inches 38.47 sq.inches

Solution Steps

The radius of the circle is $r = 3.5$ inches, and $\pi = 3.14$.

The area $A$ of a circle is calculated using the formula: $$A = \pi r^2$$

Substitute $r = 3.5$ and $\pi = 3.14$ into the formula: $$A = 3.14 \times (3.5)^2$$

First, calculate $(3.5)^2$: $$(3.5)^2 = 12.25$$ Then multiply by $\pi$: $$A = 3.14 \times 12.25 = 38.465$$ Rounding to four significant digits: $$A = 38.47 \text{ square inches}$$

Final Answer