A circular plate has a diameter of 6 inches. A pancake in the center of the plate has a radius of 2 inches. How much of the plate is not covered? Use pi as 3.14.

A = pi * r^2

Plate:
3.14 * 9 = 28.26

Pancake:
3.14 * 4 = 12.56

28.26 - 12.56 = ________ sq. inches

15.70

18

21

To solve this problem, we need to calculate the area of the circular plate and the area of the pancake, and then subtract the pancake's area from the plate's area.

First, let's find the area of the circular plate. The formula for the area of a circle is A = πr^2, where A is the area and r is the radius.

The diameter of the plate is 6 inches, so the radius is half of that, which is 6 / 2 = 3 inches.

Plugging the values into the formula, we get:

A = 3.14 x (3)^2
A = 3.14 x 9
A = 28.26 square inches

So, the plate has an area of 28.26 square inches.

Now, let's find the area of the pancake. The radius of the pancake is given as 2 inches.

Using the same formula, we can find the area:

A = 3.14 x (2)^2
A = 3.14 x 4
A = 12.56 square inches

So, the pancake has an area of 12.56 square inches.

To find out how much of the plate is not covered, we subtract the area of the pancake from the area of the plate:

Not covered area = Plate area - Pancake area
Not covered area = 28.26 - 12.56
Not covered area = 15.7 square inches

Therefore, 15.7 square inches of the plate are not covered by the pancake.