Answer: 2 hours and 27 minutes
I would solve this using tangents. Let h be height of flagpole.
Set up 2 right triangles, each with a base of 40.
The larger triangle has height of "h+70"
Smaller triangle has height of 70.
Now write the tangent ratios:

Note: A-B = 9
To solve for h we need to use the "Difference Angle" formula for Tangent

Plug in what we know:



Answer:

Step-by-step explanation:
Given

Required
Determine the equation of line that passes through (-8,0) and parallel to 
Parallel lines have the same slope.
In 
The slope, m is

because the general form of a linear equation is:

Where

So, by comparison:

Next, is to determine the equation of line through (-8,0)
This is calculated using:

Where


So, we have:





