Find the standard deviation of the data summarized in the given frequency table.A company had 80 employees whose salaries are summarized in the frequency table below. Find the standard deviation. 
A. 8600.4
B. 7963.3
C. 8361.5
D. 8839.3
Answer: B
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Provide an appropriate response.If a body of mass m falling from rest under the action of gravity encounters an air resistance proportional to four times the square root of velocity, then the body's velocity t seconds into the fall satisfies the equation: m
= mg - 4kv2where k is a constant that depends on the body's aerodynamic properties and the density of the air.Determine the equilibrium, velocity curve, and the terminal velocity for a 170 lb skydiver (mg = 170) with k = 0.005.
A. Equilibrium: v = 
vterminal = 92.20 ft/sec
B. Equilibrium: v = 
vterminal = 92.20 ft/sec
C. Equilibrium: v = 
vterminal = 92.20 ft/sec
D. Equilibrium: v = 
vterminal = 92.20 ft/sec
Refer to the weighted voting system 
and the Banzhaf definition of power. (The five players will be called P1, P2, P3, P4, and P5.)In this weighted voting system,
A. P3 has four times as much power as P5. B. P3 has twice as much power as P4. C. P3 and P4 have the same power. D. P3 has three times as much power as P4. E. none of these
Simplify the expression. Assume that all variables are positive.
? 
A. 1
B. 
C. 
D. 
Perform the indicated operation(s). Simplify if possible.
+ 
A. 
B. 
C. 
D. 3x + 5