Find the length of the indicated portion of the trajectory.r(t) = (2cos t)i + (2sin t)j + 7tk, 0 ? t ? ?/2
A. 
?
B. 
?
C. 
?
D. 
?
Answer: C
Mathematics
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Find the number of proper subsets of the set.{1, 2, 3, ..., 6}
A. 58 B. 64 C. 127 D. 63
Mathematics
Graph the inequality.5x + y ? 1
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.The square of the difference between a number and 4 is 36. Find the number(s).
A. 10, 22 B. 10 C. -2, 10 D. 52
Mathematics
Solve the equation.
= 8
A. 
B. {64}
C. {8}
D. ?
Mathematics