Answer the question.What value for x makes the expression 8 + 2x equal to 16?
A. 3
B. 7
C. 5
D. 4
Answer: D
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Find the volume of the solid generated by revolving the region bounded by the given lines and curves about the 
. y = 2csc x, y = 2
, 
? x ? 
A. 4?2 + 8? B. ?2 + 4? C. 4?2 - 8? D. 2?2 - 4?
Evaluate the function. Round to two decimal places.Evaluate 
when x = 4.
A. 57.88 B. 34.73 C. 23.15 D. 28.94
Solve the problem.Southwest Dry Cleaners believes that it will need new equipment in 9 years. The equipment will cost $26,000. What lump sum should be invested today at 5% compounded semiannually, to yield $26,000? Round to the nearest cent.
A. $20,905.81 B. $20,775.96 C. $23,097.31 D. $16,670.31
Solve the problem.The concentration of a certain drug in the bloodstream t minutes after swallowing a pill containing the drug can be approximated using the equation 
where C(t) is the concentration in arbitrary units and t is in minutes. Find the rate of change of concentration with respect to time at 
minutes.
A. - 
units/min
B. - 
units/min
C. - 
units/min
D. - 
units/min