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Sum Up the News

Sum Up the News

Program Content for November 25, 2014



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?

               A. Dilation

               B. Reflection

               C. Rotation

               D. Translation



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?

               A. πX

               B. 2X

               C. X2

               D. X3



3. A line segment,  is drawn between two of the midpoints on the triangle FGH. If M is the midpoint of  and  =  then which of the following is true?

               A.  and   are congruent

               B.  is parallel to


               D.  =



Based on the article “China outlines climate objectives” on page A3 of the Thursday, November 20th, Seattle Times.

4. In 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



6.  China’s 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?

               A. 53%

               B. 65%

               C. 117%

               D. 153%



7. A 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 2005’s levels?

               A. 19%

               B. 22%

               C. 23%

               D. 25%



Based on the article “Roofs begin to fail under snow’s weight” on page A2 of the Friday, November 21st, Seattle Times.

8.  The 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



9. 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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