Two points on L1 and two points on L2 are given. Determine whether L1 is parallel to L2, L1 is perpendicular to L2, or neither.L1: (3, 1), (8, -1); L2: (1, -1), (-4, -3)
A. parallel
B. perpendicular
C. neither
Answer: C
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A. 
B. 
C. 
D. 
Determine whether the number is rational or irrational. Find a decimal approximation to the nearest thousandth.
A. Irrational, 51.000 B. Rational, 51.000 C. Irrational, 10.100 D. Rational, 10.100
Evaluate the exponential function at the specified value of x.f(x) = 
x, x = 3
A. 
B. 
C. 
D. 64
The percent of light that will pass through a material is given by the formula lgP = -kd, where P is the percent of light passing through the material (in fractions), k is a constant that depends on the material, and d is the thickness of the material in centimeters. The constant k for a piece of tinted glass is 0.4. How thick (in centimeters) is a piece of this glass that allows 50% of the light incident to the glass to pass through it? Round to the nearest hundredth of a centimeter.
a. 1.73 b. 0.75 c. 4.25 d. 9.78 e. 3.32