June 2010 Integrated Algebra Regents 28 – 30
28. (4) Quadrant IV
Some people can see this without graphing. Good for you if you are one of them!
If not, graph it. On the calculator choose y = 2x, move to the left of and hti enter 3 times (changes the line to a thick line, then a greater than triangle, finally a less than triangle). Graph. The fourth quadrant is shaded completely.
29 (2) 44.1
The area of the rectangle is 6×5 = 30
The area of the semicircle is half the area of the circle, or which is about 14 something.
30. (1) $6,600
Find the new total (plug-in) . The calculator will handle order of operations, or be careful to evaluate the exponent before the multiplication (you get 15000 x 1.44). Subtract the original investment to find the profit.