Chapter 2, Introduction to Algebra Video Solutions, Prealgebra

The Eiffel Tower has several levels visitors can walk around on. The first is 57 meters above the ground, the second is 115 meters high, and the third level is 276 meters high. What is the location of someone standing on the first level in relation to someone standing on the third level?

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Problem 83

The Bright Angel trail at Grand Canyon National Park ends at Indian Garden, $3,060$ feet below the trailhead. Write this as a negative number with respect to the trailhead.

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Problem 84

The South Kaibab Trail at Grand Canyon National Park ends at Cedar Ridge, $1,140$ feet below the trailhead. Write this as a negative number with respect to the trailhead.

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Problem 85

Depreciation refers to the decline in a car's market value during the time you own the car. According to sources such as Kelley Blue Book and Edmunds.com, not all cars depreciate at the same rate. Suppose you pay 25,000 dollars for a new car which has a high rate of depreciation. Your car loses about 5,000 dollars in value per year. Represent this loss in value as a negative number. A car with a low rate of depreciation loses about 2,750 dollars in value each year. Represent this loss as a negative number.

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Problem 86

In June, 2007 the U.S. Census Bureau released population estimates for the twenty-five cities with the largest population loss between July $1,2005$ and July $1,2006 .$ New Orleans had the largest population loss. The city's population fell by $228,782$ people. Detroit, Michigan experienced a population loss of $12,344$ people during the same time period. Represent the loss of population for New Orleans and for Detroit as a negative number.

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Problem 87

Yamina is flying from Phoenix to San Francisco on a Boeing 737 jet. When the plane reaches an altitude of $33,000$ feet, the temperature outside the plane is 61 degrees below zero Fahrenheit. Represent this temperature with a negative number. If the temperature outside the plane gets warmer by 10 degrees, what will the new temperature be?

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Problem 88

At 11: 00 in the morning in Superior, Wisconsin, Jim notices the temperature is 15 degrees below zero Fahrenheit. Write this temperature as a negative number. At noon it has warmed up by 8 degrees. What is the temperature at noon?

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Problem 89

At 10: 00 in the morning in White Bear Lake, Minnesota, Zach notices the temperature is 5 degrees below zero Fahrenheit. Write this temperature as a negative number. By noon the temperature has dropped another 10 degrees. What is the temperature at noon?

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Problem 90

Steve is snorkeling in the ocean near his home in Maui. At one point he is 6 feet below the surface. Represent this situation with a negative number. If he descends another 6 feet, what negative number will represent his new position?

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Problem 91

New Orleans, Louisiana, is 1 time zone west of New York City. Represent this time zone as a negative number, as discussed in the introduction to this chapter.

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Problem 92

Seattle, Washington, is 2 time zones west of New Orleans, Louisiana. Represent this time zone as a negative number, as discussed in the introduction to this chapter.

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Problem 93

Find the wind chill temperature if the thermometer reads $25^{\circ} \mathrm{F}$ and the wind is blowing at 25 miles per hour.

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Problem 94

Find the wind chill temperature if the thermometer reads $10^{\circ} \mathrm{F}$ and the wind is blowing at 25 miles per hour.

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Problem 95

Which will feel colder: a day with an air temperature of $10^{\circ} \mathrm{F}$ and a 25 -mph wind, or a day with an air temperature of $-5^{\circ} \mathrm{F}$ and a $10-\mathrm{mph}$ wind?

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Problem 96

Which will feel colder: a day with an air temperature of $15^{\circ} \mathrm{F}$ and a 20 -mph wind, or a day with an air temperature of $5^{\circ} \mathrm{F}$ and a $10-\mathrm{mph}$ wind?

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Problem 97

Figure 5 is a bar chart of the information in Table $3 .$ Use the template in Figure 6 to construct a scatter diagram of the same information. Then connect the dots in the scatter diagram to obtain a line graph of that same information. (Notice that we have used the numbers 1 through 12 to represent the months January through December.) (GRAPH CANNOT COPY).

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Problem 98

Figure 7 is a bar chart of the information in Table $4 .$ Use the template in Figure 8 to construct a scatter diagram of the same information. Then connect the dots in the scatter diagram to obtain a line graph of that same information. (Again, we have used the numbers 1 through 12 to represent the months January through December.) (GRAPH CANNOT COPY).

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