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EXAMPLE 4 Use the scale on a map Maps Use a metric ruler and the map of Ohio to estimate the distance between Cleveland and Cincinnati. SOLUTION From the map’s scale, 1 centimeter represents 85 kilometers. On the map, the distance between Cleveland and Cincinnati is about 4.2 centimeters.

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EXAMPLE 4 Use the scale on a map Write and solve a proportion to find the distance d between the cities. = 4.2 d 1 centimeters 85 kilometers Cross products property d = 357 Simplify. ANSWER The actual distance between Cleveland and Cincinnati is about 357 kilometers. 1 d = 85 4.2

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EXAMPLE 4 Use the scale on a map GUIDED PRACTICE for Example 4 5. Use a metric ruler and the map in Example 4 to estimate the distance (in kilometers) between Columbus and Cleveland. about 212.5 kmANSWER

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EXAMPLE 4 Use the scale on a map GUIDED PRACTICE for Example 4 6.6. The ship model kits sold at a hobby store have a scale of 1 ft : 600 ft. A completed model of the Queen Elizabeth II is 1.6 feet long. Estimate the actual length of the Queen Elizabeth II. Model ships ANSWERabout 960 ft

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EXAMPLE 2 Using the Cross Products Property 6.8 15.4 = 40.8 m Write original proportion. Cross products property Multiply. 6.8m 6.8 = 628.32 6.8 Divide.

EXAMPLE 2 Using the Cross Products Property 6.8 15.4 = 40.8 m Write original proportion. Cross products property Multiply. 6.8m 6.8 = 628.32 6.8 Divide.

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