Fiona finds that the distance between two cities is 83,400,000 millimeters. What is the distance between the two cities in kilometers? Use the metric table to help answer the question.

Question

Metric Table
kilo-
hecto-
deka-
unit
deci-
centi-
milli-
1,000
100
10
1
0.1
0.01
0.001
8.34 kilometers
83.4 kilometers
834 kilometers
8,340 kilometers

Answer 1

To convert the distance from millimeters to kilometers, you can use the metric prefixes.

1 kilometer (km) is equal to 1,000,000 millimeters (mm).

To convert 83,400,000 millimeters to kilometers, you can divide by 1,000,000:

\[ \text{Distance in kilometers} = \frac{\text{Distance in millimeters}}{1,000,000} \] \[ \text{Distance in kilometers} = \frac{83,400,000 \text{ mm}}{1,000,000} = 83.4 \text{ km} \]

Therefore, the distance between the two cities is 83.4 kilometers.