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Math Help - help with story problem please

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    help with story problem please

    The epxression pie2 gives the area of a circle with the radius r. How many square meters of wheat were destryoed when an alian ship made a crop circle of diameter 25 meters in the wheat field at the southwind Ranch? find pie on the calculater?
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    Quote Originally Posted by fancyface View Post
    The epxression pie2 gives the area of a circle with the radius r. How many square meters of wheat were destryoed when an alian ship made a crop circle of diameter 25 meters in the wheat field at the southwind Ranch? find pie on the calculater?
    By the way, it's "pi" not "pie."

    If the diameter d = 25 m, then the radius is r = \frac{d}{2} = \frac{25 \, m}{2} = 12.5 \, m. So the area of the circle is:
    A = \pi r^2 = \pi (12.5 \, m)^2 = 490.874 \, m^2.

    You will find "pi" on your calculator by looking for the symbol " \pi".

    -Dan
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