Areas Related to Circles

If the circumference of a circle is 44 cm, then its area is:...

The area of a quadrant of a circle whose circumference is 22 cm is:...

If the radius of a circle is doubled, its area becomes:...

The length of an arc of a sector of angle $\theta$ in a circle of radius $r$ is:...

The area of a sector of angle $p$ (in degrees) of a circle with radius $R$ is:...