Find the derivative of y with respect to x.y = -cos-1 
A. 
B. 
C. 
D. - 
Answer: C
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Write the fraction.According to a recent study, 7 out of 17 visits to a hospital emergency room were for an injury. What fraction of emergency room visits were injury-related?
A. 
B. 
C. 
D. 
Solve the problem.Using a phone card to make a long distance call costs a flat fee of $0.88 plus $0.25 per minute starting with the first minute. What is an equation of the form 
for this situation?
A. y = 0.88x + 0.25 B. y = 0.25x + 0.88 C. y = 0.25x D. y = 0.88x
Answer the question.If x represents a negative integer, how would you express its negative?
Fill in the blank(s) with the appropriate word(s).
Rationalize the denominator. Assume that all variables represent positive real numbers and that the denominator is not zero.
A. 
B. 
C. 
D. 