Math Test

55 Minutes—38 Questions

CALCULATOR SECTION

This section corresponds to Section 4 of your answer sheet.

Directions: For this section, solve each problem and decide which is the best of the choices given. Fill in the corresponding oval on the answer sheet. You may use any available space for scratch work.

Notes:

1. Calculator use is permitted.

2. All numbers used are real numbers, and all variables used represent real numbers, unless otherwise indicated.

3. Figures are drawn to scale and lie in a plane unless otherwise indicated.

4. Unless stated otherwise, the domain of any function f is assumed to be the set of all real numbers x, for which f (x) is a real number.

1. Oceans, seas, and bays represent about 96.5 percent of Earth’s water, including the water found in our atmosphere. If the volume of the water contained in oceans, seas, and bays is about 321,000,000 cubic miles, which of the following best represents the approximate volume, in cubic miles, of all the world’s water?

A) 308,160,000

B) 309,765,000 

C) 332,642,000

D) 334,375,000

2. An electrician charges a one-time site visit fee to evaluate a potential job. If the electrician accepts the job, he charges an hourly rate plus the cost of any materials needed to complete the job. The electrician also charges for tax, but only on the cost of the materials. If the total cost of completing a job that takes h hours is given by the function C(h) = 45h + 1.06(82.5) + 75, then the term 1.06(82.5) represents

A) the hourly rate.

B) the site visit fee.

C) the cost of the materials, including tax.

D) the cost of the materials, not including tax.

 

3. The figure above shows the solution set for the system of inequalities. Which of the following is not a solution to the system?

A) (0, 3)

B) (1, 2)

C) (2, 4)

D) (3, 3)

4. Each of the following quadratic equations represents the graph shown above. Which equation reveals the exact values of the x- intercepts of the graph?

A) 

B) 

C) 

D) 

5. Margo surveyed all the students in the government classes at her school to see what they thought should be the most important concern of a national government. The results of the survey are shown in the figure above. If the ratio of students who answered “Foreign Policy” to those who answered “Environment” was 5:3, what percentage of the students answered “Environment”?

A) 16%

B) 21%

C) 24%

D) 35%

6. Which of the following best describes the type of association shown in the scatterplot above?

A) Linear, positive

B) Linear, negative

C) Exponential, positive

D) Exponential, negative

7. The figure above shows the average annual gas prices in the United States from 2003 to 2013. Based on the information shown, which of the following conclusions is valid?

A) A gallon of gas cost more in 2008 than in 2013.

B) The price more than doubled between 2003 and 2013.

C) The drop in price from 2008 to 2009 was more than $1.00 per gallon.

D) The overall change in price was greater between 2003 and 2008 than it was between 2008 and 2013.

8. If (x, y) is a solution to the system of equations above, what is the sum of x and y ?

 

A) 

B) -4 

C) 

D) −3

9. A voltage divider is a simple circuit that converts a large voltage into a smaller one. The figure above shows a voltage divider that consists of two resistors that together have a total resistance of 294 ohms. To produce the desired voltage of 330 volts,  must be 6 ohms less than twice . Solving which of the following systems of equations gives the individual resistances for  and ?

A) 

B) 

C) 

D) 

10. If what is the value of x ?

A) x = −2

B) x = 2

C) There is no value of x for which the equation is true.

D) There are infinitely many values of x for which the equation is true.

11. Crude oil is being transferred from a full rectangular storage container with dimensions 4 meters by 9 meters by 10 meters into a cylindrical transportation container that has a diameter of 6 meters. What is the minimum possible length for a transportation container that will hold all of the oil?

A) 40π

B) 

C) 60π 

D)  

12. The percent increase from 5 to 12 is equal to the percent increase from 12 to what number?

A) 16.8

B) 19.0

C) 26.6

D) 28.8

13. The brightness of a celestial body, like a star, decreases as you move away from it. In contrast, the luminosity of a celestial body is a constant number that represents its intrinsic brightness. The inverse square law, shown above, is used to find the brightness, b, of a celestial body when you know its luminosity, L, and the distance, d, in meters to the body. Which equation shows the distance to a celestial body, given its brightness and luminosity?

A) 

B) 

C) 

D) 

Questions 14 and 15 refer to the following information.

Each month, the Bureau of Labor Statistics conducts a survey called the Current Population Survey (CPS) to measure unemployment in the United States. Across the country, about 60,000 households are included in the survey sample. These households are grouped by geographic region. A summary of the January 2014 survey results for male respondents in one geographic region is shown in the table below.

14. According to the data in the table, for which age group did the smallest percentage of men report that they were unemployed in January 2014?

A) 20 to 24 years

B) 35 to 44 years

C) 45 to 54 years

D) Over 54 years

15. If one unemployed man from this sample is chosen at random for a follow-up survey, what is the probability that he will be between the ages of 45 and 54?

A) 6.0%

B) 13.6%

C) 15.1%

D) 44.9%

16. Which of the following are solutions to the quadratic equation

A) 

B) 

C) 

D) 

17. Damien is throwing darts. He has a total of 6 darts to throw. He gets 5 points for each dart that lands in a blue ring and 10 points for each dart that lands in a red ring. If x of his darts land in a blue ring and the rest land in a red ring, which expression represents his total score?

A) 10x

B) 10x + 5

C) 5x + 30

D) 60 − 5x

18. Red tide is a form of harmful algae that releases toxins as it breaks down in the environment. A marine biologist is testing a new spray, composed of clay and water, hoping to kill the red tide that almost completely covers a beach in southern Florida. He applies the spray to a representative sample of 200 square feet of the beach. By the end of the week, 184 square feet of the beach is free of the red tide. Based on these results, and assuming the same general conditions, how many square feet of the 10,000-square-foot beach would still be covered by red tide if the spray had been used on the entire area?

A) 800

B) 920

C) 8,000

D) 9,200

19. If (a, b) is a solution to the system of equations above, which of the following could be the value of b ?

A) −3

B) −2

C) 1

D) 2

20. Given the function what domain value corresponds to a range value of 3 ?

A) −6

B) −2

C) 6

D) 9

21. A landscaper buys a new commercial-grade lawn mower that costs $2,800. Based on past experience, he expects it to last about 8 years, and then he can sell it for scrap metal with a salvage value of about $240. Assuming the value of the lawn mower depreciates at a constant rate, which equation could be used to find its approximate value after x years, given that x < 8?

A) y = −8x + 2,560

B) y = −240x + 2,800

C) y = −320x + 2,800

D) y = 240x − 2,560

22. A microbiologist is studying the effects of a new antibiotic on a culture of 20,000 bacteria. When the antibiotic is added to the culture, the number of bacteria is reduced by half every hour. What kind of function best models the number of bacteria remaining in the culture after the antibiotic is added?

A) A linear function

B) A quadratic function

C) A polynomial function

D) An exponential function

23. An airline company purchased two new airplanes. One can travel at speeds of up to 600 miles per hour and the other at speeds of up to 720 miles per hour. How many more miles can the faster airplane travel in 12 seconds than the slower airplane?

A) 

B) 

C) 2

D) 30

24. The table above shows the 2014 minimum wages for several states that share a border. Assuming an average workweek of between 35 and 40 hours, which inequality represents how much more a worker who earns minimum wage can earn per week in Oregon than in Idaho?

A) x ≤ 1.85

B) 7.25 ≤ x ≤ 9.10

C) 64.75 ≤ x ≤ 74

D) 253.75 ≤ x ≤ 364

25. In the United States, the maintenance and construction of airports, transit systems, and major roads is largely funded through a federal excise tax on gasoline. Based on the 2011 statistics given below, how much did the average household pay per year in federal gasoline taxes?

• The federal gasoline tax rate was 18.4 cents per gallon.
• The average motor vehicle was driven approximately 11,340 miles per year.
• The national average fuel economy for noncommercial vehicles was 21.4 miles per gallon.
• The average American household owned 1.75 vehicles.

A) $55.73

B) $68.91

C) $97.52

D) $170.63

 

26. Following the catastrophic oil spill in the Gulf of Mexico in April of 2010, more than 900  bottlenose dolphins were found dead or stranded in the oil spill area. The figure above shows the weight of a rescued dolphin during its recovery. Based on the quadratic model fit to the data shown, which of the following is the closest to the average rate of change in the dolphin’s weight between week 2 and week 8 of its recovery?

A) 4 pounds per week

B) 16 pounds per week

C) 20 pounds per week

D) 40 pounds per week

27. As shown in the figure above, a lifeguard sees a struggling swimmer who is 40 feet from the beach. The lifeguard runs 60 feet along the edge of the water at a speed of 12 feet per second. He pauses for 1 second to locate the swimmer again, and then dives into the water and swims along a diagonal path to the swimmer at a speed of 5 feet per second. How many seconds go by between the time the lifeguard sees the struggling swimmer and the time he reaches the swimmer?

A) 16

B) 22

C) 50

D) 56

28. What was the initial amount of gasoline in a fuel trailer, in gallons, if there are now x gallons, y gallons were pumped into a storage tank, and then 50 gallons were added to the trailer?

A) x + y + 50

B) x + y − 50

C) y − x + 50

D) x − y − 50

29. The figure above shows the net change, as a percentage, for U.S. import and export prices from January to July 2014 as reported by the Bureau of Labor Statistics. For example, U.S. import prices declined 0.2 percent in July while export prices remained unchanged for that month. Based on this information, which of the following statements is true for the time period shown in the figure?

A) On average, export prices increased more than import prices.

B) Import prices showed an increase more often than export prices.

C) Import prices showed the greatest change between two consecutive months.

D) From January to July, import prices showed a greater overall decrease than export prices.

30. The Ironman Triathlon originated in Hawaii in 1978. The format of the Ironman has not changed since then: it consists of a 3.86-kilometer swim, a 180.2-kilometer bicycle ride, and a 42.2-  kilometer run, all raced in that order and without a break. Suppose an athlete bikes 10 times as fast as he swims and runs 5 times as fast as he swims. The variable x in the expression above represents the rate at which the athlete swims, and the whole expression represents the number of hours that it takes him to complete the race. If it takes him 16.2 hours to complete the race, how many kilometers did he swim in 1 hour?

A) 0.85

B) 1.01

C) 1.17

D) 1.87

31. What value of x satisfies the equation

32. Some doctors base the dosage of a drug to be given to a patient on the patient’s body surface area (BSA). The most commonly used formula for calculating BSA is where w is the patient’s weight (in kilograms), h is the patient’s height (in centimeters), and BSA is measured in square meters. How tall (in centimeters) is a patient who weighs 150 kilograms and has a BSA of square meters?

33. A college math professor informs her students that rather than grading the final exam on a curve, she will replace each student’s lowest test score with the next to lowest test score, and then re-average the test grades. If Leeza has test scores of 86, 92, 81, 64, and 83, by how many points does her final testaverage change based on the professor’s policy?

34. In the figure above, are diameters of the circle. If  y = 2x − 12, and the shaded area is of the circle, what is the value of x ?

35. If the slope of a line is and a point on the line is (4, 7), what is the y-intercept of the line?

36. Rory left home and drove straight to the airport at an average speed of 45 miles per hour. He returned home along the same route, but traffic slowed him down and he only averaged 30 miles per hour on the return trip. If his total travel time was 2 hours and 30 minutes, how far is it, in miles, from Rory’s house to the airport?

Questions 37 and 38 refer to the following information.

                Chemical Makeup of One Mole of Chloroform

A chemical solvent is a substance that dissolves another to form a solution. For example, water is a solvent for sugar. Unfortunately, many chemical solvents are hazardous to the environment. One ecofriendly chemical solvent is chloroform, also known as trichloromethane . The table above shows the chemical makeup of one mole of chloroform.
 

37. Carbon makes up what percent of the mass of one mole of chloroform? Round your answer to the nearest whole percent and ignore the percent sign when entering your answer.

38. If a chemist starts with 1,000 grams of chloroform and uses 522.5 grams, how many moles of chlorine are left?