Rationalize the denominator.
A. 
B. 6
C. 6
D. 
Answer: A
Mathematics
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Use reduction formulas to evaluate the integral.
A. - 
sin 2x cos3 2x + 
+ 
sin 4x + C
B. - 
sin 2x cos3 2x + 
+ 
sin 4x + C
C. - 
sin 2x cos3 2x + 
+ 
cos 4x + C
D. - 
sin 2x cos2 2x + 
+ 
sin 4x + C
Mathematics
Perform the calculation. Express the answer in degree-minutes-seconds format.90° - 9°11'
A. 81°49' B. 80°11' C. 81°11' D. 80°49'
Mathematics
Solve the problem.An ascending weather balloon starts taking air samples at a height of 31,000 feet and every 1000 feet thereafter. What is its height when it takes the 7th sample?
A. 39,000 ft B. 38,000 ft C. 37,000 ft D. 36,000 ft
Mathematics
Solve the equation. 
- 3 = -1
A. -2 B. 2, -2 C. -4, 4 D. 2
Mathematics