Find an equation for the graph.
A. y = 5 sin (3?x)
B. y = 5 sin 
C. y = 3 sin 
D. y = 3 sin (5?x)
Answer: A
Mathematics
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Solve the problem.A 100 gal tank is half full of distilled water. At time = 0, a solution containing 2 lb/gal of concentrate enters the tank at the rate of 4 gal/min, and the well-stirred mixture is withdrawn at the rate of 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. 200 pounds B. 150 pounds C. 187.5 pounds D. 175 pounds
Mathematics
Find the product.9x5(6x7 - 5)
A. 54x7 - 45 B. 9x5 C. 54x12 - 45x5 D. 54x12 - 5
Mathematics
Graph the parabola.y2 = -20x
A. 
B. 
C. 
D. 
Mathematics
Refer to the figure . Answer true or false. 
1. m?A>m?1
2. If m?2
Mathematics