The person in charge of information management is the database administrator.
<h3>What is a database?</h3>
The term database refers to the arranging of the data that concerns clients in relevant entry point such as computers and file cabinets. This is the way by which companies are bale to keep track of their customers.
The person that is most helpful in the management of the  tens of thousands of customer addresses in three different computer systems and written on paper in filing cabinets is the database administrator.
Learn more about database:brainly.com/question/6447559
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Explanation:
Since compasses work by pointing along magnetic field lines, this means that there must be a magnetic field near the wire through which the current is flowing.
 
        
                    
             
        
        
        
Given that:
Distance , s = 18.5 m
Velocity , v = 3.85 m/s
Time , t =?
Since,
Velocity = distance/time
or
Time= distance/velocity
time= 18.5/ 3.85
time= 4.8 s
So the time elapse between the release of the ball and the ball passing home plate is 4.8 seconds.
 
        
             
        
        
        
Answer:
a. 15.4 seconds
b. 0.455 m/s
Explanation:
a. The carousel rotates at 0.13 rev/s. 
This means that it takes the carousel 1 sec to make 0.13 of an entire revolution.
This means that time it will take to make a complete revolution is:
1 / 0.13 = 7.7 seconds
Therefore, the time it will take to make 2 revolutions is:
2 * 7.7 = 15.4 seconds
b. Let us calculate the linear velocity. Angular velocity is given as:

where v = linear velocity and r = radius
The radius of the circle is 3.5 m and the angular velocity is 0.13 rev/s, therefore:
0.13 = v / 3.5
v = 3.5 * 0.13 = 0.455 m/s
Linear velocity is 0.455 m/s
 
        
             
        
        
        
Answer:
 T = 188.5 s, correct is  C
Explanation:
This problem must be worked on using conservation of angular momentum. We define the system as formed by the fan and the paper, as the system is isolated, the moment is conserved
          
initial instant. Before the crash
         L₀ = r m v₀ + I₀ w₀
the angular speed of the fan is zero w₀ = 0
final instant. After the crash
         L_f = I₀ w + m r v
         L₀ = L_f
         m r v₀ = I₀ w + m r v
angular and linear velocity are related
         v = r w
         w = v / r
         m r v₀ = I₀ v / r + m r v
          m r v₀ = (I₀ / r + mr) v
        v = 
let's calculate
        v = 
        v = 
        v = 0.02 m / s
          
To calculate the time of a complete revolution we can use the kinematics relations of uniform motion
         v = x / T
          T = x / v
the distance of a circle with radius r = 0.6 m
          x = 2π r
we substitute
          T = 2π r / v
let's calculate
          T = 2π 0.6/0.02
          T = 188.5 s
reduce
          t = 188.5 s ( 1 min/60 s) = 3.13 min
 correct is  C