Solve the equation by making an appropriate substitution.x - 8
- 128 = 0
A. {192}
B. {256}
C. {512}
D. {128}
Answer: B
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Express as a single logarithm and, if possible, simplify.
ln 4x2 - 
ln 2m5
A. ln 
B. 
ln (8 xm10)
C. ln 
D. 8 ln (xm10)
Which of the following is NOT a cause of student difficulty on the broken ruler problem?
a. Inability to read fractional lengths. b. Believing that the number appearing below the right side of an object measured on the ruler indicates its length, regardless of where the object is placed on the ruler. c. Counting a mark above a whole number as a unit of length rather than the distance between two consecutive whole numbers. d. Over-reliance on calculators as computational devices.
Find the area of the region that lies inside the first curve and outside the second curve.
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Find the magnitude and direction angle (to the nearest tenth) for each vector. Give the measure of the direction angle as an angle in [0,360°].
A. 12; 45°
B. 6; 45°
C. 6
; 135°
D. 6; 225°