If a circle has a radius of 1.109 m,what is its area expressed to the correct number of significant figures? A)3.86 m² B)3.863 m² C)3.864 m² D)3.8638 m² E)3.86379 m²

Question

Quizplus · Accepted Answer

The area of a circle is calculated using the formula $A = \pi r^2$, where $r$ is the radius. Substituting the given radius, $1.109$ m, we get $A = \pi (1.109)^2$. Calculating this gives an area of approximately $3.86379$ m^2. However, since the radius is given to four significant figures, the area should also be reported to four significant figures, making the correct answer $3.864$ m^2.

If a Circle Has a Radius of 1