Use a trigonometric substitution to evaluate the integral.
A. 0.343
B. 0.043
C. 0.069
D. -0.069
Answer: C
Mathematics
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Use an Euler diagram to determine whether the argument is valid or invalid.All birds have feathers.
Therefore, no mammals are birds.
A. valid B. invalid
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Solve the system by graphing. If there is no solution or an infinite number of solutions, so state. Use set notation to express the solution set.
A. {(3, 4)} B. {(-3, -4)} C. {(-1, -2)} D. {(-3, 4)}
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Draw a vector representing the velocity. ? 30 mph due south ?
A. ?
B. ?
C. ?
D. ?
E. ?
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Find all cube roots of the complex number. Leave answers in trigonometric form.2 + 2i
A. 
cis 20°, 
cis 140°, 
cis 260°
B. 
cis 20°, 
cis 140°, 
cis 260°
C. 
cis 30°, 
cis 150°, 
cis 270°
D. 
cis 20°, 
cis 140°, 
cis 260°
Mathematics