Rationalize the denominator.
A. 
(
- 1)
B. 
(
+ 1)
C. 
(
+ 1)
D. 
(
+ 1)
Answer: C
Mathematics
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Solve and graph the solutions.|x - 11| < 10
A. 
B. 
C. 
D. 
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Solve the problem.As one approaches a certain sound source, the sound intensity in arbitrary units increases according to the following function of time: F(x) = - 
. Starting at x = 0, when the source of sound is first sensed, how much time elapses until maximum sound intensity is felt? Round the result to the nearest hundredth.
A. 2.07 sec B. 26.07 sec C. 14.77 sec D. 0.36 sec
Mathematics
Use the definition or identities to find the exact value of the indicated trigonometric function of the acute angle ?.tan ? = 
Find cos ?.
A. 
B. 
C. 
D. 
Mathematics
Complete the square and then use the shifting technique to graph the function.f(x) = x2 + 2x
A. 
B. 
C. 
D. 
Mathematics