Factor.25x4y + 40x3y - 30xy
A. 5x3 + 8x2 - 6
B. 5xy(x3 + x2 - 6)
C. 5xy(5x3 + 8x2 - 6)
D. 5x3y(5 + 8x2 - 6x)
Answer: C
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Use the compound interest formulas A = P
nt and 
to solve.Suppose that you have $3,000 to invest. Which investment yields the greater return over 5 years: 7.5% compounded continuously or 7.6% compounded semiannually?
A. $3,000 invested at 7.5% compounded continuously over 5 years yields the greater return. B. Both investment plans yield the same return. C. $3,000 invested at 7.6% compounded semiannually over 5 years yields the greater return.
Find the minimum-cost spanning tree for the graph.
A. 
B. 
C. 
D. 
Solve the inequality.x2 + 7x ? -3x - 21
A. -3 ? x ? -7
B. x ? - 
or x ? 
C. 3 ? x ? 7
D. x ? -3 or x ? -7
Solve.The average cost per tape, in dollars, for a company to produce x sports videotapes is given by the functionA(x) = 
for x > 0
Graph the function on the interval (0, ?) and complete the following:A(x) ? 
as x ? ?.
A. 
A(x) ? 1 as x ? ?.
B. 
A(x) ? 0 as x ? ?.
C. 
A(x) ? 15 as x ? ?.
D. 
A(x) ? 20 as x ? ?.