Sand dollars are animals that live buried in the sand of shallow coastal waters. The thin circular body of a sand dollar is usually 2 to 4 inches wide. Find the area of a sand dollar that is 3 inches wide.

Respuesta :

Area = πr^2

The diameter is twice the area.

The diameter is the width of a circle.

This means the radius is (3/2).

A = π(3/2)^2

A = π(9/4)

A = 9π/4

A = 7.0685834706

A = 7.07

Answer:

The area of a sand dollar that is 3 inches wide is [tex]7.0686 inch^2[/tex]

Step-by-step explanation:

Width of sand dollar's circular body  = d = 3 inches

Radius of the  sand dollar's circular body  = r

[tex]r=\frac{d}{2} = \frac{3 inch}{2}=1.5 inches[/tex]

Area of circle = [tex]\pi r^2[/tex]

So, the area of a sand dollar that is 3 inches wide:

[tex]A=3.14\times (1.5 inch)^2=7.0686 inch^2[/tex]

The area of a sand dollar that is 3 inches wide is [tex]7.0686 inch^2[/tex]