Formula:





(There are two sides for the length)


(There are two sides for the width)
The width of the desk is 15 inches
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-Geekhawk
Here is how to work 2, 3 , and 4.
Assuming you mean

that means as x approaches 4
if we sub 0 for x we get
0/0
and intermitent form
use l'hopital's rule
so
take the derivitive of the top and bottom seperatly
l'hopitals rule is something like
if

results in 0/0 or -∞/∞ or∞/∞ then keep doing it until f(n)/g(n) gives a form that isn't intermitent
so
take derivitive of top and bottom

now, if we subsitute 4 for x we get

=

=

=

=
Answer:
Your answer is
equation y=x+4
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