12.Practice.Tests.for.the.SAT_2015-2016_1128p

32 KAPLAN'S GUIDE TO THE SAT CHANGE AND PRACTICE QUESTIONS
3. Two objects that had been heated to a temperature
of 160°C were removed from a furnace
and placed in a room at 20°C. The temperatures
of the objects were measured and
recorded each hour. The data for each object
was modeled using a smooth curve as shown
in the following graph.
Cooling Results
4. A commercial airline has calculated that the
approximate fuel mileage for its 600-passenger
airplane is 0.2 miles per gallon when the plane
travels at an average speed of 500 miles per
hour. Flight 818's fuel tank has 42,000 gallons
of fuel at the beginning of an international
flight. If the plane travels at an average speed
of 500 miles per hour, which of the following
functions f models the number of gallons of
fuel remaining in the tank t hours after the
flight begins?
soot
A. j(t) = 42,000--
0.2
0.2
B. f (t) = 42,000--
500t
2 3 4
Time (hours)
C.
42,000- SOOt
j(t) =
0.2
42, 000 -0.2t
D. j(t) =
500
Which of the following does NOT accurately
describe the data?
A. Between 2 and 3 hours, the temperature
of Object 2 decreased at a faster rate
than the temperature of Object 1.
B. For the first 15 minutes, the temperature
of Object 2 decreased at a faster
rate than the temperature of Object 1.
C. At 0 hours and at 2 hours, the temperatures
of the two objects were the same.
D. As long as the temperature of the room
does not change, the graphs for each
data set will remain above y = 20.
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