Find the separation vector r from the source point (2,8,7) to the field point (4,6,8). determine its magnitude (r), and construct the unit vector ˆr.

magnitude =3 unit vector

Step-by-step explanation:

We have given source point

And the field point

Resultant vector

The resultant vector

Magnitude of the vector

Now we have to find the unit vector

So unit vector

answer:   b

step-by-step explanation:

x2 = 16

x can not be a negative number because 16 is positive

the only answer would be positive 8  

the rocket cannot penetrate the ground, in a contextual sense, therefore the roots of this equation should be the domain of this function. i'll let you find the roots of this quadratic equation (hint: use the quadratic formula:  

1- c

2-a

step-by-step explanation:

mark brainliest!