Subtract.14 - 9
A. 23
B. -23
C. -5
D. 5
Answer: D
Mathematics
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Change the complex number to rectangular form.
cos 270°
A. 2.646 + 0j B. -2.646 + 0j C. 0 - 2.646j D. 0 + 2.646j
Mathematics
Solve the problem.An airplane is sighted at the same time by two ground observers who are 2 miles apart and both directly west of the airplane. They report the angles of elevation as 12° and 
How high is the airplane? Round to the nearest hundredth of a mile.
A. 0.95 mi B. 0.42 mi C. 0.72 mi D. 1.64 mi
Mathematics
Solve the polynomial equation in the complex numbers.x3 - 5x2 + 7x + 13 = 0
A. {-1, 2 + 3i, 2 - 3i}
B. {-1, 3 + 2i, 3 - 2i}
C. {-1, 2 + 
, 2 - 
}
D. {1, 3 + 
, 6 - 
}
Mathematics
Convert the angle to a decimal in degrees. Round the answer to two decimal places.178°48'46''
A. 178.81° B. 178.77° C. 178.82° D. 178.87°
Mathematics