| 7 | Time, Percentages, and Graphs |
You can use various linear units to measure height, width, or depth. That is the first dimension. Area is the second dimension, and volume is the third. And then you have time! It, too, is a dimension. In this chapter, you’ll see how time relates to the three so-called spatial dimensions. You’ll also learn how changing quantities, in any dimension, can be considered as percentages and portrayed as graphs.
TIME AS A DIMENSION
In mathematics, any measurable quantity can be called a dimension. We use a variety of schemes and devices to measure time. The ancients used sand in an hourglass. Until recently, we used spring-wound or weight-driven clocks and watches. Quartz-crystal electronic clocks use alternating-current ...
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