Algebra Problems, Math Problems

Problem of the Day: 1/1/13

Happy new year!

Evaluate 2013^2 - 2010^2 WITHOUT a calculator.

Solution to yesterday’s problem:
Let’s write an expression to represent this problem:
5\textup{ft} \times 9\textup{ft} - \pi(2\textup{ft})^2
The 5 x 9 represents the area of the door, and the area of the wreath is subsequently subtracted.

Simplifying this,
45 - 4\pi

45 - 12.56637

32.43363

The area of the door outside the wreath is about 32.44 square feet.

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