Solve the problem.The total sales in dollars of some small businesses fluctuates according to the equation 
where x is the time in months, with x = 1 corresponding to January, 
and 
Determine the month with the greatest total sales and give the sales in that month.
A. September; $4000
B. March; $10,600
C. June; $7300
D. December; $10,600
Answer: B
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Solve the problem.Which of the following are symmetries of the letter Z?
A. a reflection with axis a vertical line B. a 180° rotation C. a reflection with axis a horizontal line D. a reflection with axis a diagonal line E. none of these
Write a matrix equation equivalent to the system of equations. 9x - 2y + 2z = 50 3x + 4y + 2z = 32 7x - 2y + 4z = 40
A. 
=
B.
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= 
C.
=
D.
= 
Solve the problem.The temperature one day was reported to be -24°F. The next day, it was reported to be 27°F. By how many degrees did the temperature rise?
A. 51°F B. 3°F C. -3°F D. -51°F
Solve the problem.Conservationists tagged 70 black-nosed rabbits in a national forest in 1990. In 1992, they tagged 140 black-nosed rabbits in the same range. If the rabbit population follows the exponential law, how many rabbits will be in the range 5 years from 1990?
A. 92 B. 396 C. 792 D. 185