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Algebra

Chapter 19

Problem 5

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5280 ft = 1 mi and 12 in = 1 ft

ft2 = mi2.


Example:

Convert: 539 square centimeters to square inches.
Solution: First note the equality 2.54 cm = 1 in.
Then divide both sides of the equality by 2.54 cm to maintain the equality.

This gives you click refresh (F5)

If you next multiply 539 cm2 by click refresh (F5) twice,

you will cancel cm2 out and convert your units to in2 which is your goal.

Or : click refresh (F5) (multiply by 1 twice)

To solve this using the graphing calculator below, enter 539(1/2.54)(1/2.54) into the box
to the right of Function f(x)=. Then click on the Plot Graph button.
Your answer will appear below the box as f(x)=83.545...