Determine the constant term that must be added to the expression to make it a perfect square.x2 - 18x
A. 324
B. 9
C. -81
D. 81
Answer: D
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Find the volume of the described solid.The solid lies between planes perpendicular to the x-axis at 
and 
. The cross sections perpendicular to the x-axis between these planes are squares whose bases run from the semicircle 
to the semicircle 
.
A. 
B. 
C. 
D. 
Find the derivative of the function.f(x) = x5 log7 x
A. x4 + 5x4log7x
B. (ln 7) x4 + 5x4log7x
C. 
D. 
+ 5x4log7x
Use Bayes' rule to find the indicated probability.The incidence of a certain disease on the island of Tukow is 4%. A new test has been developed to diagnose the disease. Using this test, 91% of those who have the disease test positive while 4% of those who do not have the disease test positive (false positive). If a person tests positive, what is the probability that he or she actually has the disease?
A. 0.438 B. 0.487 C. 0.91 D. 0.856
Perform the indicated operation where possible.
+ 
A. 
B. Not defined
C. 
D. 