Exam 3: Numbers in the Real World

Solve the problem. -Find the gasoline price index for 1975 using the 1955 price as the reference value. Use the table below. YEAR|GASOLINE PRICE (cents per gallon) 1955 29.1 1965 31.2 1975 56.7 1985 119.6 1995 120.5 2000 155.0 2010 284.0

Solve the problem. -The area of Jose's apartment is 45% more than the area of Alan's apartment. Determine which of the statement's below is true.

Solve the problem. Round your answer to the nearest tenth unless otherwise indicated. -The weight of the child is 6 kilos while the weight of her father is 97.9 kilos. 97.9 kilos is what percent of 6 kilos?

Write the percentage as a fraction or decimal, as indicated. -Write as a fraction. 30%

Restate the fact as indicated. -The population of the United States in 2000 was roughly 280 million. Express this as the number of people per square mile. The land area of the United States is roughly 3,536,000 square miles.

Write the percentage as a fraction or decimal, as indicated. -Write as a decimal. 390%

Use scientific notation to perform the following operations. Leave your answer in scientific notation. - $\left( 25 \times 10 ^ { - 8 } \right) \div \left( 5 \times 10 ^ { 4 } \right)$

Answer the question. -Which of the statements below suggests an appropriate level of precision?

Solve the problem. -Cathy scored 7 times as much as Helen on the test. Determine which of the statement's below is true.

Solve the problem. Round your answer to the nearest tenth unless otherwise indicated. -Best's Computers claims that of its 4280 items in inventory, 3636 items are IBM PC, while the rest are Apple. What percent of total inventory is Apple? Round to the nearest tenth of a percent.

Solve the problem. Round your answer to the nearest tenth unless otherwise indicated. -Chuck has saved $364 at the bank. He wants to save $2300 for a trip to Alaska. What percent of his goal has been reached?

Solve the problem. Round your answer to the nearest tenth unless otherwise indicated. -Alex and Juana went on a 50-mile canoe trip with their class. On the first day they traveled 21 miles. What percent of the total distance was that?

Use scientific notation to solve the problem. -If you could generate energy by fusing the hydrogen in ordinary tap water, how much water would you need to meet the energy needs of the United States for 35 years? Assume that the energy Released by fusion of hydrogen in one liter of water is $7 \times 10 ^ { 13 }$ joules and that the U.S. annual Energy consumption i $1 \times 10 ^ { 20 }$ joules. Give your answer in scientific notation.

Measurements are made at two different times. Find the absolute change and then find the percentage change. Roundanswers to the nearest tenth if necessary. -The value of Anna's house increased from $160,000 when she bought it 20 years ago to $1.38 million today.

Write as a percent. -0.004

Solve the problem. -Find the gasoline price index for a year in which the cost of gasoline was $0.82 per gallon. Use the 1965 price as the reference value. In 1965, the cost of gasoline was 31.2 cents per gallon.

State the number of significant digits and the implied precision of the given number. -149.1

For the given measurement, briefly describe any likely sources of random error and any likely sources of systematicerror. -You use your wrist watch to time your friends running 200 meters.

Use the Consumer Price Index below to answer the question. Average Annual Consumer Price Index (1982-1984 = 100) Year CPI Year CPI Year CPI 1986 109.6 1995 152.4 2004 188.9 1987 113.6 1996 156.9 2005 195.3 1988 118.3 1997 160.5 2006 201.6 1989 124.0 1998 163.0 2007 207.3 1990 130.7 1999 166.6 2008 215.3 1991 136.2 2000 172.2 2009 214.5 1992 140.3 2001 177.1 2010 218.1 1993 144.5 2002 179.9 2011 224.9 1994 148.2 2003 184.0 2012 229.6 -In 1991, the federal minimum hourly wage was $3.5. Convert this to 2000 dollars.

Find the absolute and relative errors. -The length of the piece of fabric is 27 inches but you measure it as 25.5 inches.