A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • 5 years ago

the area of a circle is found by the equation a=pi r ^2 . if the area a of a certain circle is 16 pi square inches, find its radius r a. 8 pi inch b. 4 inch c. 32 inch d. 8 inch

  • This Question is Closed
  1. myininaya
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    a=pi*r^2 16=pi*r^2 16/pi=r^2 (16/pi)^(1/2)=r 4/(pi)^(1/2)=r

  2. myininaya
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    oh the area is 16pi

  3. myininaya
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    ok so we have 16pi=pi*r^2

  4. myininaya
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    divide both sides by pi so we have 16=r^2 what is the square root of 16?

  5. myininaya
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    that will be your radius once you answer that question

  6. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    4

  7. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    thanks

  8. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.