Factor.x2 - 18xy + 81y2
A. (x - 9y)(x + 9y)
B. x2 - 18xy + 81y2
C. (x - 9y)2
D. (x + 9y)2
Answer: C
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Solve the problem.
A note is due in 4 years, with interest of 4% compounded semiannually. The face value of the note is $26,000. Find the maturity value of the note and find the minimum sale price of the note if money can be deposited at 8% compounded quarterly. Use the compound interest table.
A. $35,582.80, $22,190.76 B. $30,463.14, $16,264.53 C. $30,463.16, $22,190.89 D. $28,154.27, $20,508.86
Write the number as an exponential expression, using the base shown. Check your result with a calculator.1 (base 8)
A. 80
B. 
C. 81
D. -80
Solve the problem.Suppose the number of Quickie hamburgers (in millions) served yearly can be modeled by 
Approximate how many years it takes for the number of hamburgers served to reach 54 million. Round to the nearest year.
A. 1 yr B. 4 yr C. 3 yr D. 2 yr
Match the graph to one of the polar equations.
A. r = 
B. ? = -
C. r = -
D. ? = 