Graph the line.Through (0, 4), m = - 
A. 
B. 
C. 
D. 
Answer: C
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Change the Cartesian integral to an equivalent polar integral, and then evaluate.
A. 
B. 
C. 
D. 
Solve the problem.Find the average rate of change. Use appropriate units.
Number of Hours Spent Traveling
A. 0.4 mi per hour B. 0.2 mi per hour C. 4.6 mi per hour D. 2.6 mi per hour
Factor by grouping.18r2 + 45ry - 2xr - 5xy
A. (2r + 5y)(x - 9r) B. (2r + 5y)(9x - r) C. (5r + 2y)(9r - x) D. (2r + 5y)(9r - x)
Solve the problem.A 200 gal tank is half full of distilled water. At time = 0, a solution containing 1 lb/gal of concentrate enters the tank at the rate of 4 gal/min, and the well-stirred mixture is withdrawn at the rate of 
When the tank is full, how many pounds of concentrate will it contain?
A. 100 pounds B. 200 pounds C. 120 pounds D. 150 pounds