Solve the problem.Assume that the profit generated by a product is given by 
where x is the number of units sold. If the profit keeps changing at a rate of 
per month, then how fast are the sales changing when the number of units sold is 1400? (Round your answer to the nearest dollar per month.)
A. $112,250/month
B. $3/month
C. $4490/month
D. $2245/month
Answer: C
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Solve the variation problem.The weight of a liquid varies directly as its volume V. If the weight of the liquid in a cubical container 
on a side is 192 grams, find the weight of the liquid in a cubical container 5 cm on a side.
A. 15 grams B. 375 grams C. 105 grams D. 125 grams
Determine the coordinates of the points shown. Tell in which quadrant the point lies. Assume the coordinates are integers.
A. (-6, -8); quadrant III B. (-6, -8); quadrant IV C. (-6, -4); quadrant IV D. (-6, -4); quadrant III
Factor the expression completely, if possible.49y4 + 56y3 + 16y2
A. y2(7y + 4)2 B. y2(7y - 4)2 C. y2(7y + 4)(7y - 4) D. (7y2 + 4y)2
Express the denominate number and a compound denominate number.Express 21,606 feet in terms of miles and feet.
A. 4 miles 1606 feet B. 4 miles 1596 feet C. 4 miles 496 feet D. 4 miles 486 feet