Find the specified quantity.Find the period of y = -5 cos 
.
A. 
B. 5
C. ?
D. 
Answer: D
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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a solution containing 1 lb/gal of concentrate enters the tank at the rate of 4 gal/min, and the well-stirred mixture is withdrawn at the rate of 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
Add or subtract as indicated. Write the answer in simplest form.
+ 
- 
A. 
B. 
C. 
D. 
Solve the problem.A machine in a factory produces 540 units each hour. How many units does the machine produce per minute?
A. 216 units B. 22 units C. 4 units D. 9 units
Give the domain and range of the relation.
A. domain: {4, 5, 7}; range: {12, 13} B. None of these C. domain: {4, 7, 12}; range: {5, 13} D. domain: {5, 13}; range: {4, 7, 12}