The equation for line A is 
. A perpendicular line (line B) passes through the point 
. Write the equation in slope-intercept form of line B.
A. 
B. 
C. 
D. 
Answer: D
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Solve the equation using the quadratic formula.x2 + x + 5 = 0
A. 
B. 
C. 
D. 
Solve the problem.The loudness of a sound is measured in decibels (dB). The loudness L of a sound is related to its intensity I by the equation 
where I0 = 10-12 watts per square meter (W/m2) is the intensity of the faintest sound the human ear can detect. Find the dB level of a radio at average volume from 9 feet away when it has an intensity of 
W/m2.
A. ? 63 dB B. ? 73 dB C. ? 53 dB D. ? 43 dB
The graph of an exponential function is given. Select the function for the graph from the functions listed.
A. f(x) = - 2-x B. f(x) = 2-x C. f(x) = 2x D. f(x) = - 2x
Multiply to find the exact answer. Express the answer as a whole or mixed number when possible and simplify.2
? 23
A. 61
B. 60
C. 51
D. 46