Use the vectors u and v to find (-2u) × v.
?
?
A. 
B. 
C. 
?
D. 
E. 
Answer: E
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Solve for the variable.1.3x + 2.4 = 0.5x - 1.68
A. x = -0.196 B. x = -5.1 C. x = -5.61 D. x = -5.2
The polar equation of the graph is either r = a + b cos ? or r = a + b sin ?, a > 0, b > 0. Match the graph to one of the equations. 
A. r = 3 + 4 cos ? B. r = 4 + 3 cos ? C. r = 3 + 4 sin ? D. r = 4 + 3 sin ?
Solve the problem.Suppose that the speed of a car, measured in miles per hour (mph), is monitored for some short period of time after the driver applies the brakes. The following table and graph relate the speed of the car to the amount of time, measured in seconds (sec), elapsed from the moment that the brakes are applied. What is happening to the speed of the car during this time frame? In which of the time intervals does the speed change the most?
A. With increasing elapsed time, the speed increases. The speed changes most during the time interval from 8 seconds to 10 seconds. B. With increasing elapsed time, the speed decreases. The speed changes most during the time interval from 2 seconds to 4 seconds. C. With increasing elapsed time, the speed decreases. The speed changes most during the time interval from 8 seconds to 10 seconds. D. With increasing elapsed time, the speed increases. The speed changes most during the time interval from 2 seconds to 4 seconds.
Solve.The price of electric guitars has varied considerably in recent years. The data in the table relates the price P, in dollars, to time t, in years. Use a cubic function fitted to the data to predict the price of an electric guitar in year 10. 
A. $827.42 B. $443.52 C. $670.48 D. $893.53