# New SAT Math Multiple Choice Practice Test 30: Calculator Section

### Test Information

15 questions

22 minutes

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1. Which of the following are solutions to the quadratic equation ?

• A.
• B.
• C.
• D.

2. 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

3. 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 much 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 sq ft
• B. 920 sq ft
• C. 8,000 sq ft
• D. 9,200 sq ft

4.

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

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

• A. -6
• B. -2
• C. 6
• D. 9

6. 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

7. 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
• C. A polynomial function
• D. An exponential function

8. 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
 State Minimum Wage per Hour Idaho \$7.25 Montana \$7.90 Oregon \$9.10 Washington \$9.32

9. 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

10. 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

11.

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

12.

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

13. 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

14.

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.

15.

The Ironman Triathlon originated in Hawaii in 1978. The format of the Ironman has not changed since then: it consists of a 3.86-km swim, a 180.2-km bicycle ride, and a 42.2-km 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

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