Which is the area of a circle with a radius of 5 units? (use 3.14 for) ?

The area of a circle is A=πr².

Since π is about 3.14 we can substitute that into the equation.

So A=3.14*r²

We can substitute the given radius for r.

A = 3.14 * 5²

When a number is squared, or has the two over it, we multiply it by itself.

5 * 5 = 25

A = 3.14 * 25

Simplify this and the area of the circle is about 78.5

A≈78.5