Perform the indicated operation.
- 
A. 
B. 
C. 
D. 
Answer: A
Mathematics
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Find the tangential and normal components of the acceleration.r(t) = (t + 9)i + (ln(cos t) - 3)j + 1k
A. a = (-sec t tan t)T - (sec t)N B. a = (sec t tan t)T - (sec t)N C. a = (sec t tan t)T + (sec t)N D. a = (-sec t tan t)T + (sec t)N
Mathematics
Simplify by removing a factor equal to 1.
A. 
B. 
C. 
D. 
Mathematics
Solve.The textbook for a history class costs $42. There are 24 students in the class. What is the total cost of the history books for the class?
A. $966 B. $1008 C. $66 D. $984
Mathematics
Tell which set or sets the number belongs to: natural numbers, whole numbers, integers, rational numbers, irrational numbers, and real numbers.
A. whole, real B. irrational, real C. integers, real D. rational, real
Mathematics