Answer:
I'd say 7ft
Step-by-step explanation:
a square has equivalent sides so just divide 49.
<em>please correct me if im wrong.</em>
 
        
             
        
        
        
Answer:
a)  .
.
b) 
Step-by-step explanation:
Given a function  , this function has the following gradient:
, this function has the following gradient:
 .
.
(a) find the gradient of f
We have that  . So
. So


 .
.
 .
.

(b) find the directional derivative of f at (2, 4, 0) in the direction of v = i + 3j − k.
The directional derivate is the scalar product between the gradient at (2,4,0) and the unit vector of v.
We have that:

 .
.

The vector is 
To use v as an unitary vector, we divide each component of v by the norm of v.

So

Now, we can calculate the scalar product that is the directional derivative.

 
        
             
        
        
        
Because 6 * 8 + ( - 2 )* 24 = 48 - 48 = 0 , the vectora u and v are orthogonal ;
Two vectors are orthogonal  if their dot product is zero.<span />
        
             
        
        
        
Answer:
Fish Tank
Step-by-step explanation:
This of a rectangular prism as a cardboard box. It has rectangles on the top and the bottom. The fish tank is somewhat similar to this so it will be a rectangular prism.