Respuesta :

mysticchacha

Answer:

The correct ones:

1.7 cm = 17 mm

345 meters = 0.345 kilometer

1.25 kilometers = 1,250 meters

Step-by-step explanation:

There are 1000 millimeters = 1 meter

so  

4.7 m = 4.7 meters  * (1000 millimeters/1 meter) = 4,700 mm  not 47,000

343 m * 100 cm /1 m =   34,300 cm  not 34.3 cm

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1.7 cm *  10 mm/1cm = 17 mm

345 m  *  (1 km / 1000 m) =  0.345 km

1.25 km  *  1000 m/ 1 km  =  1, 250 meters

The conversions 1.7 cm = 17 mm, 345 m = 0.345 km, and 1.25 km = 1,250 m are correct.

What is unit conversion?

It is defined as the conversion from one quantity unit to another quantity unit followed by the process of division, multiplication by a conversion factor.

For checking:

4.7 m = 47,000 mm

As we know, 1 m = 1000 mm

= 4.7×1000 mm

= 4700 mm

So, 4.7 m ≠ 47,000 mm

For 1.7 cm = 17 mm

1 cm = 10 mm

= 1.7×10

= 17 mm

1.7 cm = 17 mm

For 343 m = 34.3 cm:

1 m = 100 cm

= 343×100

= 34300 cm

343 m ≠ 34.3 cm

For, 345 m = 0.345 km

1 m = 0.001 km

= 345×0.001

= 0.345 km

345 m = 0.345 km

For 1.25 km = 1,250 m

1 km = 1000 m

= 1.25×1000

= 1250 m

1.25 km = 1,250 m

Thus, the conversions 1.7 cm = 17 mm, 345 m = 0.345 km, and 1.25 km = 1,250 m are correct.

Learn more about the unit conversion here:

brainly.com/question/14350438

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