Integrated Algebra - June 2009

26 What is the additive inverse of the expression a - b?

(1) a + b     (3) -a + b
(2) a - b      (4) -a - b


27 What is the product of 12 and 4.2 106 expressed in scientific notation?

(1) 50.4 106     (3) 5.04 106
(2) 50.4 107     (4) 5.04 107

28 To calculate the volume of a small wooden cube, Ezra measured an edge of the cube as 2 cm. The actual length of the edge of Ezra’s cube is 2.1 cm. What is the relative error in his volume calculation to the nearest hundredth?

(1) 0.13      (3) 0.15
(2) 0.14      (4) 0.16

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