Solve.
= 
A. {
, - 
}
B. {- 
, 
}
C. 
D. ?
Answer: B
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Solve.The average value of a certain type of automobile was $13,980 in 1992 and depreciated to $5040 in 1996. Let y be the average value of the automobile in the year x, where x = 0 represents 1992. Write a linear equation that relates the average value of the automobile, y, to the year x.
A. y = -2235x - 3900
B. y = -2235x + 13,980
C. y = -2235x + 5040
D. y = - 
x - 5040
Divide:
Simplify the algebraic expression.7 + 2(6x - 3)
A. 12x - 1 B. 6x + 1 C. 12x + 1 D. 12x + 4
Solve the problem.The instantaneous growth rate of a population is the rate at which it is growing at every instant in time. The instantaneous growth rate r of a colony of bacteria t hours after the start of an experiment is given by the function 
for 
Find the times for which the instantaneous growth rate is zero.
A. 1 sec, 2 sec, and 4 sec B. 1 sec C. 2 sec and 4 sec D. 1 sec and 2 sec