Post a New Question

math

posted by .

A circular coaster, with a diameter of 7 inches, is positioned on a white placement. The placement is a circle whose radius is equal to the diameter of the coaster. About how many square inches of the placemat are NOT covered by the coaster? Show your work.

  • math -

    It would help if you proofread your questions before you posted them.

    I assume that all of your "placements" are really placemats.

    Area = π * r^2

    d = 2r

    Area of coaster = π * 3.5^2

    Area of placemat = π * 7^2

    Subtract area of coaster from area of placemat.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

More Related Questions

Post a New Question