Subtract.-19 - (-12)
A. -31
B. 7
C. -7
D. 31
Answer: C
Mathematics
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Provide an appropriate response.The function f(x) = x2 is a probability density function on the interval [0, b]. What is b?
A. 
B. 
C. 
D. 
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?A student spends 24% of the day involved in class or study activities. How many hours are spent studying or attending class? ?
A. ?7.26 hours B. 5.76 hours C. ?1 hour D. ?6 hours E. 5.66 hours
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Evaluate.
- 
A. - 
B. 
C. 
D. 
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Perform the indicated operations. Simplify the answer.
A. 2i
B. i
C. 
D. 
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