In Exercises 7–12, use the following information. The metric system is based on three different units:
• the gram (1 gram = 0.0022046 pound)
• the meter (1 meter = 39.37 inches)
• the liter (1 liter = 61.025 cubic inches)
Other units are formed by adding the following prefixes to these basic units:
• kilo-, which means one thousand (for example, 1 kilometer = 1,000 meters)
• centi-, which means one hundredth (for example, 1 centimeter = 1/100 meter)
• milli-, which means one thousandth (for example, 1 millimeter = 1/1,000 meter)
In the United States, a typical freeway speed limit is
65 miles per hour.
In Germany, a typical autobahn speed limit is 130 kilometers per hour.
a. Use dimensional analysis to convert this into miles per hour. (Round off to the nearest whole number.)
b. How many more miles will a car traveling at 130 kilometers per hour go in 1 hour than a car traveling at 65 miles per hour? (Round off to the nearest whole number.)
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