Math Can someone check my answers ?

What is the surface area of a circle that has a diameter of 14 inches?

A. 49.86 in2

B. 153.86 in2

C. 196.86 in2

D. 616.86 in2

B

  1. 👍 0
  2. 👎 0
  3. 👁 102
  1. B looks ok to me but that looks like too many significant figures for the data you posted.

    1. 👍 0
    2. 👎 0
    posted by DrBob222
  2. thats what my teacher gave me so it right ?

    1. 👍 0
    2. 👎 0
  3. Are you sure it's "surface area" and it's "circle"? Because usually if the shape is 2D, the term is 'area' only.

    If it's "area of a circle" only,
    A,circle = pi*r^2
    A,circle = 153.9 in^2 (closest to letter B)

    If it's "surface area of a sphere",
    SA,sphere = 4*pi*r^2
    SA,sphere = 615.8 in^2 (closest to D)

    hope this helps :3

    1. 👍 0
    2. 👎 0
    posted by Jai
  4. yes i double checked with my teacher n the question is right

    1. 👍 0
    2. 👎 0
  5. Jai is right. Surface area confused me too but I assumed area since a one dimensional circle must be area.

    1. 👍 0
    2. 👎 0
    posted by DrBob222

Respond to this Question

First Name

Your Response

Similar Questions

  1. For -Ms Sue

    Claim: the lateral (side ) surface of any area of any cylinder can is larger than the circlar surface area of its bottom. Which of the following is an example showing that the claim is false? a. a can with the diameter of 5 inches

    asked by Mary on May 25, 2011
  2. geometry- need help

    Claim: the lateral (side ) surface of any area of any cylinder can is larger than the circlar surface area of its bottom. Which of the following is an example showing that the claim is false? a. a can with the diameter of 5 inches

    asked by Mary on May 25, 2011
  3. Math

    Find the surface area of the outside of a cylindrical barrel with a diameter of 10 inches and a heights of 12 inches. Is this question asking for the curved part or the circle?

    asked by Anonymous on November 16, 2009
  4. math

    What is the surface area of a circle that has a diameter of 14 inches?

    asked by nick on April 20, 2013
  5. math

    What is the surface area of a circle that has a diameter of 14 inches?

    asked by isaac on February 24, 2012
  6. math

    What is the surface area of a circle that has a diameter of 14 inches?

    asked by isaac on February 24, 2012
  7. summer math hw

    one circle has a diameter of 10 inches. a second circle has a diameter that is twice the diameter of the first circle What is the ratio of the area of the smaller circle to the larger circle

    asked by lesleyy on August 31, 2014
  8. math

    If the number of square inches in the area of a circle is equal to the number of inches in its circumference,the diameter of the circle is a. 4 inches b. 2 inches c. 1 inches d. pi inches e. 2 pi inches please answer and explain

    asked by thomas on August 9, 2014
  9. math

    If the number of square inches in the area of a circle is equal to the number of inches in its circumference,the diameter of the circle is a. 4 inches b. 2 inches c. 1 inches d. pi inches e. 2 pi inches please answer and explain

    asked by thomas on August 8, 2014
  10. Math

    A spherical balloon with a surface area of 36pi square inches is inflated further until its diameter has increased by 50%. The surface area of the balloon is now? I know the formula for surface area is A=4pi*r squared. I don't

    asked by Gayle on May 11, 2014
  11. math

    If the number of square inches in the area of a circle is equal to the number of inches in its circumference, the diameter of the circle is A. 4 inches B. 3 inches C. 1 inch D. NONE

    asked by Korosu on August 13, 2014

More Similar Questions