Solve the problem.Sketch a graph that depicts the amount of water in a 50-gallon tank during the course of the described pumping operations. The tank is initially full, and then a pump is used to take water out of the tank at a rate of 6 gallons per minute. The pump is turned off after 5 minutes. At that point, the pump is changed to one that will pump water into the tank. The change takes 2 minutes and the water level is unchanged during the switch. Then, water is pumped into the tank at a rate of 2 gallons per minute for 3 minutes.
A. 
B. 
C. 
D. 
Answer: A
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Solve the problem.A company is constructing an open-top, square-based, rectangular metal tank that will have a volume of 
What dimensions yield the minimum surface area? Round to the nearest tenth, if necessary.
A. 10.6 ft × 10.6 ft × 0.5 ft B. 3.8 ft × 3.8 ft × 3.8 ft C. 5.5 ft × 5.5 ft × 1.8 ft D. 4.8 ft × 4.8 ft × 2.4 ft
Multiply to find the exact answer. Express the answer as a whole or mixed number when possible and simplify.1
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? 
A. 
B. 
C. 
D. 
Change the following hexadecimal number to decimal form.
Fill in the blank(s) with the appropriate word(s).
Add and write the resulting polynomial in descending order of degree.(7x8 + 3x7 - 8x6 + 8) + (9x8 + 6x7 - 5x6 - 4)
A. 16x8 + 9x7 + 13x6 + 4 B. 16x8 - 9x7 + 13x6 + 4 C. 16x8 + 9x7 - 13x6 + 4 D. 16x8 - 9x7 - 13x6 + 4