Use the fact that the trigonometric functions are periodic to find the exact value of the expression. Do not use a calculator.tan 720°
A. 
B. -1
C. 0
D. undefined
Answer: C
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Solve the problem.If w = 4i - 4j - k, find a vector perpendicular to both w and j + k.
A. -4i + 8j + 4k B. -2i + 4j - 4k C. 4i - 4j - 3k D. -3i - 4j + 4k
Solve the problem.How many 9-symbol codes can be formed using 5 different symbols? Repeated symbols are allowed.
A. 126 B. 1,953,125 C. 15,120 D. 3024
Solve the problem.A roulette wheel contains 72 slots numbered 1 through 72. The slots 1,4,7,... are red, the slots 2,5,8,... are green, and the slots 3, 6, 9,.... are brown. When the wheel is spun, a ball rolls around the rim and falls into a slot. What is the probability that the ball falls into a green slot?
A. 
B. 
C. 
D. 
Solve the problem.Tuition of $2700 is due when the spring term begins, in 
What amount should a student deposit today, at 
to have enough to pay tuition?
A. $2432.43 B. $2494.23 C. $2515.53 D. $205.77