Question 266783
A.	Draw a label diagram of the situation
answer - - > I will let you draw the picture
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B.	How far from the building should the base of the ladder be placed to achieve the optimum operating angle?
we need to use a cosine function as
{{{cos(60) = d/108}}}
So, d can be expressed as
{{{d = 108*cos(60)}}}
or
{{{D = 54}}} feet

C.	How far should the ladder be extended to reach the roof? 
Here we use a sine function as
{{{sin(60) = 76/L}}}
so, L can be expressed as
{{{L = 76/sin(60)}}}
or
{{{L = 87.75}}} feet