Answer:
A, C, D
Step-by-step explanation:
 
        
                    
             
        
        
        
The vector ab has a magnitude of 20 units and is parallel to the
vector 4i + 3j. Hence, The vector AB is 16i + 12j.
<h3>How to find the vector?</h3>
If we have given a vector v of initial point A and terminal point B
v = ai + bj
then the components form as;
AB = xi + yj
Here, xi and yj are the components of the vector.
Given;
The vector ab has a magnitude of 20 units and is parallel to the
vector 4i + 3j.
magnitude
 
Unit vector in direction of resultant = (4i + 3j) / 5
Vector of magnitude 20 unit in direction of the resultant
= 20  x (4i + 3j) / 5
= 4 x (4i + 3j) 
= 16i + 12j
Hence, The vector AB is 16i + 12j.
Learn more about vectors;
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Answer:
The real zeros of f(x) are x = 0.3 and x = -3.3.
Step-by-step explanation:
Solving a quadratic equation:
Given a second order polynomial expressed by the following equation:
 .
.
This polynomial has roots  such that
 such that  , given by the following formulas:
, given by the following formulas:
 
 
 
In this problem, we have that:

So

 
 
 
The real zeros of f(x) are x = 0.3 and x = -3.3.