Write the complex conjugate.8 + 3i
A. 8 - 3i
B. -3i
C. 3i
D. 8 + 3i
Answer: A
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Find the volume of the circular cone. Use 3.14 or 
for ? as indicated and round as indicated. Use 3.14 for ?. Round to the nearest hundredth.
A. 123.41 mm3 B. 123.53 mm3 C. 370.24 mm3 D. 41.18 mm3
Solve.A plane makes a 240-mile trip against a head wind in 1 hour and 30 minutes and returns, with a tail wind of the same speed, in 1 hour. What is the speed of the wind?
A. 80 mph B. 200 mph C. 40 mph D. 160 mph
Find the exact value of the following expression without using a calculator.sec (?/2)
A. Undefined B. 1 C. 0 D. -1
Rewrite the quadratic equation in the form ax2 + bx + c = 0, then identify a, b, and c. 0.6 - 9x + 0.8x2 = 0
A. a = -0.8, b = -9, c = 0.6 B. a = 0.8, b = -9, c = 0.6 C. a = 0.8, b = 9, c = 0.6 D. a = 0.8, b = 9, c = -0.6