Find the exact value of the expression.cos 40° cos 20° - sin 40° sin 20°
A. 
B. 
C. 
D. 
Answer: D
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Use the theoretical probability formula to solve the problem. Express the probability as a fraction reduced to lowest terms.A die is rolled. The set of equally likely outcomes is {1, 2, 3, 4, 5, 6}. Find the probability of getting a 3.
A. 
B. 0
C. 3
D. 
Perform the indicated operation.(a + 12b)(-4a + 7b)
A. -4a2 - 41ab - 41b2 B. a2 - 41ab - 41b2 C. -4a2 - 41ab + 84b2 D. a2 - 41ab + 84b2
Write out the sum. Do not evaluate.
A. 2 + 7 + 12 + 17 + 22 + 27 + ... B. 2 + 7 + 12 + 17 + 22 + 27 C. 60 D. 1 + 2 + 7 + 12 + 17 + 22
Solve the problem.The number of gallons of water in a swimming pool t minutes after the pool has started to drain is 
How fast is the water running out at the end of 14 minutes?
A. 600 gal/min B. 1800 gal/min C. 900 gal/min D. 300 gal/min