# math

a 31'' diameter circle has an area of _ sq ft. ???

1. 👍 0
2. 👎 0
3. 👁 163
1. A = pi * r^2

A = 3.14 * 15.5^2

A = 3.14 * 240.25

A = ? sq. ft.

1. 👍 0
2. 👎 0
2. 754.385 is this correct

1. 👍 0
2. 👎 0
3. That's the area in square inches.

1 square inch = 0.00694444444 square feet

754.385 * 0.00694444444 = 5.23878472 square feet

1. 👍 0
2. 👎 0

## Similar Questions

1. ### Mathematics

1. Find the circumference of the given circle. Round to the nearest tenth. (Circle with radius of 3.5 cm) -22.0 cm -38.5 cm -11.0 cm -42.8 cm 2. Find the area of the given circle. Round to the nearest tenth. (Circle with a

2. ### math

Is the following statement true or false? Justify your answer using what you know about diameters and chords. Every diameter of a circle is a chord. True. Every diameter of a circle is a chord. This is true because every diameter

3. ### Algebra

Points A(3,5) and B(7,10) are the endpoints of a diameter of a circle graphed in a coordinate plane. How many square units are in the area of the circle? Express your answer in terms of pi.

4. ### Math

The area of a circle is given by the expression pi(16x^2 - 40x + 25) . a) What is the diameter of the circle? b) What is its circumference?

1. ### math

AOD is a diameter of circle O. The coordinates of points A and D are (-11,-5)and (-3,-5)Find the area of circle O. a. 9 pi b. 16 pi c. 25 pi d. 64 pi e. 116 pi please answer and explain

2. ### geometry

The area of a circle is about 78.5 square meters. Which of these is the diameter of the circle?

3. ### math help asap

1.which of the following is a radius of the circle a.DE b.AB C.CE 2.which of the following is a diameter of the circle a.ED b.EC c.BA 3.which of the following is a chord, but not a diameter, of the circle a.CE b.FD c.DE 4.what is

4. ### Geometry

The endpoints of a diameter of a circle are A(2,1) and B(5,5. Find the area of the circle in terms of pi.

1. ### Math

Use 3.14 for π. Round answers to the nearest hundredth if necessary. The figure shows a circle with a point Upper X labeled at the center. Calculate the area of Circle X if the diameter is 13 inches. ____ square inches Calculate

2. ### math

A circle has an area of 25 pi cm^2.If a circle is drawn within that circle with a diameter equal to the radius of the first circle, what is the area of the second circle? a. 2 1/2 pi cm^2 b. 4 1/4 pi cm^2 c. 5 1/4 pi cm^2 d. 6 1/4

3. ### math

what is the expression for the area of the shaded region in the diagram in factored form? diagram: (shaded) Large circle have diameter of 8x (clear) small circle have diameter of 8y ___ my work: Area of large circle - Area of

4. ### Math

For any circle, which ratio is equal to the number π? Select all that apply. ***A. Circumference ------------------- Diameter B. Circumference ------------------- Radius ***C. Circumference ------------------- 2 Times Radius D.