The graph represents the system of equations 
. Solve graphically.
A. 
B. 
C. 
D. 
E. no solution
Answer: D
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Find the nth term an of the geometric sequence.an = 
; 9000, 900, 90, . . . .
A. n = 5 B. n = 8 C. n = 10 D. n = 6
In business, equipment is often depreciated using the double declining-balance method. In this method, a piece of equipment with a life expectancy of N years, costing $C, will depreciate to a value of $V in n years, where n is given by the formula
?
?
A word processor worth $470 when new had a life expectancy of 10 years. If it is now worth $130, how old is it? Round to the nearest tenth.
?
A. 2.8 years old B. 5.8 years old C. 1.5 years old D. 0.3 years old E. 7.2 years old
Simplify. Assume that variables can represent any real number.
A. 3z3
B. 3z2
C. 9z3
D. 9z2
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