1. A transformation is applied to a triangle on
the coordinate plane so that two of its vertices move from (2, 6)
and (4, 2) to (3, 9) and (6, 3) respectively. What sort of
transformation was applied to the triangle?
2. A cylinder is dilated along all three of its
axes by a scale factor of X. How many times larger will the surface
area of the new cylinder be when compared with the surface area of
the old cylinder?
3. A line segment, is drawn
between two of the midpoints on the triangle FGH. If M is the
midpoint of and
which of the following is true?
the article “China outlines climate objectives” on page A3 of the
Thursday, November 20th, Seattle Times.
2013 China used 3.6 billion tons of coal. The new agreement hopes to
slow the growth of China’s coal usage. The new guidelines will limit
China’s coal consumption to 4.2 billion tons in 2020. If coal
burning in China increases linearly until 2020, by how much will
their annual consumption increase each year?
A. 0.1 million tons
B. 86 million tons
C. 170 million tons
D. 600 million tons
5. If China’s annual coal use continues to
increase at the same rate through 2030, how many tons will the
country be using by then?
A. 4.9 billion tons
B. 5.1 billion tons
C. 5.5 billion tons
D. 5.9 billion tons
plan will limit growth in total energy use to 28% by 2020. If in
2013, coal was the source for 69% of China’s energy, by how much
will China increase its use of other energy sources by 2020?
previous commitment had the U.S. reducing its greenhouse-gas
emissions by 17% below 2005’s levels by the 2020. The U.S has now
committed to cutting emissions to between 26% and 28% below 2005’s
levels by the year 2025. If the U.S.’s emissions had been decreasing
exponentially under the old plan and continued falling at the same
rate through 2025, by how much would emissions have fallen from
the article “Roofs begin to fail under snow’s weight” on page A2 of
the Friday, November 21st, Seattle Times.
town of Wales, New York had 7 feet of snow fall over the week,
including 37 inches in the last 26 hours of the three-day snow
storm.On average, how
much snow fell each hour during the snow storm?
A. 0.5 inches per hour
B. 0.8 inches per hour
C. 1.2 inches per hour
D. 1.5 inches per hour
Local regulations require that buildings in the area have roofs that
are strong enough to handle up to 50 pounds on each square foot. If
the density of the snow that was falling was 100 kilograms per cubic
meter, how high could the snow pile up on the roofs that met the
building codes? (1 kg ≈ 2.20 pounds; 1 meter ≈ 3.28 feet)
A. 2.4 feet
B. 5.6 feet
C. 8.0 feet
D. 10.2 feet
10. Rain was forecast for the days following
the storm. The rain threatened to freeze upon falling on the snow,
increasing the density of the snow. What volume of snow could a
20-foot by 30-foot rectangular roof hold if the rain increases the
snow density by a factor of 1.5?
A. 3,200 cubic feet
B. 5,600 cubic feet
C. 7,200 cubic feet
D. 90,000 cubic feet
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