Find the length of the indicated portion of the curve.r(t) = (2cos t)i + (2sin t)j + 3tk, 0 ? t ? ?/2
A. 
?
B. 
?
C. 
?
D. 
?
Answer: B
Mathematics
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Solve the inequality.
? 0
A. (-?, -8] or [4, ?) B. [-8, 1) or [4, ?) C. (-?, -8] or (1, 4] D. [-8, 1) or (1, 4]
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Find the sum of the sequence.
A. -4 B. -10 C. -3 D. -12
Mathematics
Find the exact value of the indicated trigonometric function of the angle ? in the figure. Rationalize the denominator where necessary.Find csc ?.
A. 
B. 
C. 
D. 
Mathematics
Convert the temperature algebraically. Round the answer to one decimal place.91.7°C to Fahrenheit
A. 18.9°F B. 82.9°F C. 133.1°F D. 197.1°F
Mathematics