... applications, 86 95 Calendars, 97 99 365-day, 98 , 99 Babylonian, 558base and, 59 Gregorian, 98 , 99 Julian, 98 , 99 , 451lunar, 97 98 , 98 , 99 lunisolar, 98 , 99 solar, 98 as time scales, 4 69 Calorie counting, ... 4 39, 575Cubic equations, 11, 438–440, 439tCubic meters, 124, 1 29, 575Cubing it (Power of three), 1 79 Cubit, 308Cumulative frequency, 521Currency exchange rates, 1 29, 195 , 195 – 196 , 196 , 5 49, ... lenses, 399 , 399 , 400f, 402–403Camera obscura, 391 , 402Cameras, 398 –403development of, 402digital, 29, 154, 401Kodak, 402shutter speed, 399 , 401Canadacurrency exchange rates, 196 travel...