Solve the problem.A lumber yard has fixed costs of $2910.40 a day and variable costs of $1.00 per board-foot produced. The company gets $2.60 per board-foot sold. How many board-feet must be produced daily to break even (zero profit)?
A. 2910 board-feet
B. 808 board-feet
C. 1212 board-feet
D. 1819 board-feet
Answer: D
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A line contains the given points. (a) Find the slope of the line that is parallel to the line containing the given points. (b) Find the slope of the line that is perpendicular to the line containing the given points.(3, 3) and (-4, -4)
A. (a) - 
; (b) 
B. (a) -1; (b) 1
C. (a) 1; (b) -1
D. (a) 0; (b) 0
Simplify the complex rational expression using either Method I or Method II.
A. 
( x - 2)
B. 0
C. 
D. - 
Solve the problem.Assume that the rate of change of the population of a certain city is given by 
where y is the population at time t, in years. The population was 100,000 in 1980. Assume 
is 1980. Predict the population in 1990.
A. 9.2 × 105 B. 1.1 × 105 C. 1.8 × 105 D. 1.9 × 105
Solve the problem.The polynomial function 
represents the yearly income (or loss) from a real estate investment, where t is time in years. After what year does income begin to decline?
A. 12.00 B. 9 C. 8 D. 18