Scenario Two: Carbon dioxide emissions decrease • Set the carbon dioxide emissions rate to 9.8 gigatons. • Set the time step size to 10 years. • Select the step forward button once. • Decrease the carbon dioxide emissions by 0.2 and press step forward. • Continue stepping forward once, decreasing the carbon emissions each time, until you reach 2110. • Record the data in the table below. Year Carbon Emissions (gigatons) Temperature (Fahrenheit) 1960 4.2 57.2 1970 5.8 57 1980 6.2 57.4 1990 7.8 57.6 2000 8 58 2010 9.8 58 Decrease carbon dioxide emissions by 0.2 each step forward for the rest of scenario two. 2020 0.2 2030 0.2 2040 0.2 2050 0.2 2060 0.2 2070 0.2 2080 0.2 2090 0.2 2100 0.2 2110 0.2

In δabc shown below, bd over ba equals be over bc: triangle abc with segment de intersecting sides ab and bc respectively. the following flowchart proof with missing statements and reasons proves that if a line intersects two sides of a triangle and divides these sides proportionally, the line is parallel to the third side: top path, by given the ratio of line segments bd to ba is equal to the ratio of line segments be to bc. by space labeled by 2, space labeled by 1 occurs. by corresponding parts of similar triangles, angle bde is congruent to angle bac. by converse of the corresponding angles postulate, line segment de is parallel to line segment ac. bottom path, by reflexive property of quality, angle b is congruent to angle b. by space labeled by 2, space labeled by 1 occurs. by corresponding parts of similar triangles, angle bde is congruent to angle bac. by converse of the corresponding angles postulate, line segment de is parallel to line segment ac. which reason can be used to fill in the numbered blank space? 1. δabc ~ δbed 2. side-angle-side similarity postulate 1. δabc ~ δbed 2. side-side-side similarity theorem 1. δabc ~ δdbe 2. side-angle-side similarity postulate 1. δabc ~ δdbe 2. side-side-side similarity theorem