The function f is one-to-one. Find its inverse.f(x) = x2 - 1, x ? 0
A. f-1(x) = 
+ 1, x ? 0
B. f-1(x) = 
, x ? 1
C. f-1(x) = 
+ 1, x < 0
D. f-1(x) = 
, x ? -1
Answer: D
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A. Experiment with single blinding B. Experiment with double blinding C. Case-control study D. Observational study E. Experiment without blinding
Use unit ratios to convert the units.36,960 feet to miles
A. 7 mi B. 184.8 mi C. 7.5 mi D. 8 mi
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Sketch the angle in standard position.135° 
A. 
B. 