Write the conjugate 
of the complex number z. Then find z
.z = 1 + 4i
A. 
= 1 - 4i, z
= 1 - 16i
B. 
= 1 - 4i, z
= 17
C. 
= 1 - 4i, z
= 1 - 16i2
D. 
= 1 - 4i, z
= -15
Answer: B
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Solve the problem.A BASE jumper's velocity (in meters per second) after t seconds is given by 
where m is the mass of the object in kilograms, g = 9.8 m/s2 is the acceleration due to gravity, and k is a physical constant. How fast is the BASE jumper falling at the end of a 11 second delay? Use 
and 
Round the answer to one decimal place if necessary.
A. 629.8 m/s B. 18.9 m/s C. 64.2 m/s D. 57.3 m/s
Use the FOIL method to multiply the factors, then solve the equation.(7 - 
)(3 + 
) = 21
A. x = 0 B. x = 0, x = 16 C. x = 0, x = 4 D. x = 16
Divide.
(Round to the nearest thousandths when necessary.)
A. 158.687 B. 159.187 C. 15.919 D. 15.869
Simplify the radical expression. Assume all variables represent positive real numbers.
A. 6
B. 3
C. 3
D. 3