Find the integral.
A. 20 cos 
+ 40x cos 
+ C
B. 20 sin 
- 40x cos 
+ C
C. 40 sin 
+ 20x cos 
+ C
D. 40 sin 
- 20x cos 
+ C
Answer: D
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Find the product of the given complex number and its conjugate.2
A. 4
B. 2
C. 2
D. 2
Determine if the function f defined by the set of ordered pairs has an inverse. If so, find the inverse.{(6, -7), (11, -6), (9, -5), (7, -4)}
A. {(6, -7), (11, -6), (9, -5), (7, -4)} B. {(7, 6), (6, 11), (-5, 9), (-4, 7)} C. {(-7, 6), (-6, 11), (-5, 9), (-4, 7)} D. No inverse
Solve the triangle. 
A. A = 127.2°, B = 32.1°, C = 20.7° B. A = 32.1°, B = 127.2°, C = 20.7° C. A = 32.1°, B = 20.7°, C = 127.2° D. A = 127.2°, B = 20.7°, C = 32.1°
Find the volume of the specified solid. Use 3.14 as the approximate value of ?, and round your answer to the nearest whole number.A cone with height 3 in. and radius 7 in.
A. 44 in.3 B. 154 in.3 C. 231 in.3 D. 308 in.3