Solve the problem.A product sells by word of mouth. The company that produces the product has noticed that revenue from sales is given by 
where x is the number of units produced and sold. If the revenue keeps changing at a rate of 
per month, how fast is the rate of sales changing when 1800 units have been made and sold? (Round to the nearest dollar per month.)
A. $339,411/month
B. $12/month
C. $21,213/month
D. $10,607/month
Answer: C
Mathematics
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Write the first four terms of the sequence.an = 
A. a1 = 
, a2 = 
, a3 = 
, a4 = 
B. a1 = 
, a2 = 
, a3 = 
, a4 = 
C. a1 = 1, a2 = 
, a3 = 
, a4 = 
D. a1 = 
, a2 = 
, a3 = 
, a4 = 
Mathematics
What is the standard deviation of this set of numbers: 6, 5, 2, 9, 0, 3, 3?
A. 2.94 B. 4.00 C. 9.00 D. 3
Mathematics
Solve the system by graphing. 3x - 2y = 4-6x + 4y = 7
A. x = 1, y = 2 B. x = 2, y = 1 C. no solution D. infinite number of solutions
Mathematics
Perform the indicated operation.15.875 - 8.719
A. 7.256 B. 7.156 C. 7.356 D. 24.594
Mathematics