The distance between the baseball stadium and the airport is 1.6x10^6 centimeters. Which unit of measurement is most appropriate to measure the distance. (i need to

Get this right or i will fail)

A. Inches

B. Milimeters

C. Kilometers

D. feet

C. Kilometers People like to deal with measurements using numbers close to 1. The closer, the better. But we're not talking about absolute values. We're talking about how many leading or trailing zeros we have to deal with. 0.000000001 is just as bad as 1000000000. So let's look at the choices and see what fits best. A. Inches * This is slightly better than the 1.6 million centimeters, but is 630 thousand inches all that much better? I don't think so. B. Millimeters OK, instead of 1.6 million centimeters, we'll use 16 million millimeters. Looks like we're going the wrong way here. C. Kilometers Hmm. Instead of 1.6 million centimeters, we get 16 kilometers. That's a nice small number. Looks good. D. feet How does 52.5 thousand sound to you? Not so great. So this is another bad choice. Of the 4 choices, only kilometers is reasonable. The other units of measurement are way too small. The kilometer is approximately the same scale as the distance to be measured (distance from baseball stadium to the airport). And because it's an appropriate scale, the result is a number that's fairly close to 1. When you start measuring really small things, then units like centimeters, millimeters, or even nano-meters make sense. And going the opposite direction, when measuring long distances, things like light seconds, or light years make sense. Use the scale that closest to what you're measuring.