Post a New Question

math

posted by .

The area of a circle with radius r is given by the formula A=πr^2. If a circle has area 36π square inches, what is the radius?

  • math -

    πr^2 = 36π , divided each side by π
    r^2 = 36
    r = √36 = 6

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Circumference and Area of Circles

    can someone help me with these:Find the radius, diameter and circumference of a circle with an area of 64 cm2. Write your answers as decimals rounded to the nearest hundredth. Find the circumference and area of a circle that has a …
  2. Algebra

    The area of a circle is given by the formula A+pier^2, where r is the radius. If increasing the radius of a circle by 1 inch gives the resulting circle an area of 100pie square inches, what is the radius of the original circle?
  3. calculus

    1. The radius of a sphere is r inches at time t seconds. Find the radius when the rates of increase of the surface area and the radius are numerically equal. A 1/4π in B 1/5π in C 1/3π in D 1/8π in E 1/2π in
  4. Calculus

    an open topped cylinder has a volume of 125 cubic inches. determine the radius of the pot that will minimize it's surface area. What I have so far... radius =r keight =h V=πr²h 125/πr²=h SA = πr² + 2πr(h) = πr² …
  5. math

    If the circumference of a circle of radius r inches is equal to the perimeter of square with a side length of s inches, r/s= A. 4/π B. 2/π C. √2/π D. √2/π E. 1/2π I need help.
  6. math

    The area of a circle is found with the formula A =〖πr〗^2, where π represents 3.14. If a tile artist is placing tiles in a circular mosaic pattern and the area of the circle is 658 square feet, what is the approximate …
  7. math

    The area of a circle with radius r given by the formula A = pi r^2. If a circle has area 81 pi square in inches, what is the radius?
  8. math

    The area of a circle is given by the formula A = ðr2, where r is the radius. If increasing the radius of a circle by 1 inch gives the resulting circle an area of 100ð square inches, what is the radius of the original circle?
  9. math

    The area of a circle is 25π square inches. What is the length of the radius of the circle in inches?
  10. MATH

    The area of a circle is 25π square inches. What is the length of the radius of the circle in inches?

More Similar Questions

Post a New Question