Find 
. Write the answer in polar form with the argument between 0° and 360°z1 = 10(cos 30° + i sin 30°), z2 = 5(cos 10° + i sin 10°)
A. 5(cos 3° + i sin 3°)
B. 2(cos 3° + i sin 3°)
C. 2(cos 20° + i sin 20°)
D. 5(cos 20° + i sin 20°)
Answer: C
Mathematics
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.y = (tan-1 4x)3
A. 
B. 
C. 
D. 12(tan-1 4x)2
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Verify the integration formula.
3 ln (cosh x2) + C
A. No B. Yes
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Four players (A, B, C, and D) agree to divide the 16 items shown below by lining them up in order and using the method of markers. The players' bids are as indicated.
Item 11
A. goes to A. B. goes to B. C. goes to C. D. goes to D. E. is left over.
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Solve the problem.A bike road race starts at an elevation of 930 feet and passes through 5 stages where the elevation changes by 356 feet, 160 feet, 597 feet, 184 feet, and -276 feet. At what elevation does the race end?
A. 2503 feet B. 1951 feet C. 322 feet D. -2503 feet
Mathematics