Factor the four-term polynomial by grouping.20a3 + 12a2b - 25ab2 - 15b3
A. (4a2 - 5b2)(5a + 3b)
B. (20a2 - 5b2)(a + 3b)
C. (4a2 + 5b2)(5a - 3b)
D. (4a2 - 5b)(5a + 3b)
Answer: A
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Solve the problem.A caterer uses special stacking ovens to prepare large amounts of food. Find the total number of servings that can be prepared in one hour.Corn muffins: 18 servings per panNumber of pans per oven: 3Pan changes per hour: 4Number of ovens: 3
A. 216 servings B. 648 servings C. 162 servings D. 598 servings
Use the information given about the angle ?, 0 ? ? ? 2?, to find the exact value of the indicated trigonometric function.sec ? = 4, 0 < ? < 
Find cos 
.
A. 
B. 
C. 
D. 
Solve the problem.A reservation clerk worked 19.8 hours one day. She spent twice as much time entering new reservations as she did verifying old ones and one and a half as much time calling to confirm reservations as verifying old ones. How much time did she spend entering new reservations?
A. 17.6 hours B. 4.4 hours C. 8.8 hours D. 6.6 hours
Several logs are stored in a pile with 20 logs on the bottom layer, 19 on the second layer, 18 on the third layer, and so on. If the top layer has one log, how many logs are in the pile? ?
A. 200 B. 190 C. 210 D. 209 E. none of the above