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algebra

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Suppose you have a can of paint that will cover 400 ft squared. A. find the radius of the largest circle you can paint. Round to the nearest tenth of a foot.( hint use the formula A=3.14 times radius squared
B. Suppose you have two cans of paint, which will cover a total of 800 ft squared find the radius of the largest circle you can paint round to the nearest tenth of A foot

  • algebra - ,

    For the area of a circle is πr² as you stated so all you do is set 400 equal to πr² and solve for r.

    400=πr²/π
    127.32=r²
    √127.32)= r
    r=11.3

    Same thing for this except you use 800 instead of 400 so.

    800=πr²
    254.64=r²
    √254.64)= r
    r=15.9 or 16.0 for rounding purposes.

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