Solve the equation for exact solutions.arccos x + arccos 2x = arccos 
A. 
B. 
C. 
D. 
Answer: A
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Evaluate the logarithm.log8
A. -64 B. 3 C. -3 D. 64
Solve the equation.-4a = 24
A. -28 B. 28 C. -6 D. 1
Solve the problem.A computer company invested a total of $337 million in research and development in its scanners and video digitizers. If the amount the company spent on research and development on scanners was $83 million more than was spent on research and development on its video digitizers, how much in fact did the company spend on research and development on its scanners?
A. $210 million B. $168.5 million C. $127 million D. $337 million
Solve the problem.A car salesman receives bonus points for selling certain types of cars but can also be penalized for missing the monthly quota of total cars sold. These amounts are shown in the two tables. 
During the month the salesman sells 4 sub-compacts, 7 full-size cars and 1 luxury vehicles, but he misses his quota by 20%. What are his net points for the month?
A. -90 points B. 1140 points C. -360 points D. 90 points