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anonymous
 one year ago
When converting a measurement in cm to a measurement in km. For example 20.7 cm when I switch that to decimeters its 2.07 dm then .207 m. Then deka meter .0207 then hecto .00207 then kilometer .000207 km 2.07e4 km However my book says its 2.07e9 km. How is that happening? What am I missing?
anonymous
 one year ago
When converting a measurement in cm to a measurement in km. For example 20.7 cm when I switch that to decimeters its 2.07 dm then .207 m. Then deka meter .0207 then hecto .00207 then kilometer .000207 km 2.07e4 km However my book says its 2.07e9 km. How is that happening? What am I missing?

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0You are correct according to your post. You sure the problem is not asking you to convert \[20.7cm^2 \to km^2\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0That is what its asking. lol I figured that the squared didn't matter. Seeing as both are squared I thought I could deal with the numbers independently.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0So im guessing that the squared has something to do with why im confused but what about it being squared changes my answer?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0cm2=(cm)(cm) and km2=(km)(km) Start with given variable and units Solve for the unknown units. Try to make the starting units cancel out by multiplying the cm in denominator twice. You want km^2 so multiply the km twice by putting it as a numerator over the cm. So it equals to this \[\frac{ 20.7cm^2 }{ 1 }\times \frac{ ?km }{ 1cm }\times \frac{ ?km }{ 1cm }\] Fraction and numerator should equal after starting out the given variable. Since 0.00001km=1cm then it \[\frac{ 20.7cm^2 }{ 1 }\times \frac{ 0.0001km }{ cm }\times \frac{0.0001km }{ cm }\] Multiply it and the cm units would cancel out leaving you with just the km^2 and it would be 0.000000000207km or 2.07 x 10^9km or 2.07e^9

anonymous
 one year ago
Best ResponseYou've already chosen the best response.020.7 * 0.0001 * 0.0001 = 0.000000207 = 2.07e7 How am I still missing this?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I made a typo, supposed to be 20.7km*0.00001km*0.00001km= I made no typo explaining,just in the conversion example.
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