Solve.Students in a math class receive a B if the average of their four test scores is between 75 and 85. Raul scored 71, 82, and 88 on the first three tests. Within what range must his score on the fourth test lie if he is to get a B?
A. Between 59 and 99
B. Between 75 and 85
C. Between 70 and 90
D. At least 59
Answer: A
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Solve.Find an equivalent expression for cos3 x in terms of function values of x, 2x, or 3x, raised only to the first power.
A. 
cos x + 
cos 3x
B. 
cos x - 
cos 3x - cos 2x
C. 
cos x + 
cos 3x + cos 2x
D. 
cos x - 
cos 3x
Solve.A boat moves at a rate of 120 mph in still water. It travels 210 miles upstream in the same time that it takes to travel 240 miles downstream. What is the speed of the current?
A. 8 mph B. 1 mph C. 7 mph D. 3 mph
Solve the problem.A computer printer allows for optional settings with a panel of four on-off switches in a row. How many different settings can be selected if no three adjacent switches can all be off?
A. 12 B. 14 C. 10 D. 13
Solve the proportion equation.
= 
A. 
B. 5
C. 
D. 16