45 minutes / 4 miles = 11.25 mph. The correct answer choice would be A.
        
             
        
        
        
Via monthly payments:  ($100/mo)*(48 monts) = $4800, as opposed to $4000 cash.  That's a difference of $800!  Pay cash if y ou can.
        
             
        
        
        
Answer: x ≈ 18 ft
Step-by-step explanation:
We will use our trig knowledge to solve this. 
The man is standing 10 ft away, but we also need to add the 5 ft shadow as well as that is a point on our triangle. 
We can set up a simple trig equation of: tan(50) = x/15
x being the height of the lamppost.
Now we solve.
tan(50) = 1.1918
1.1918 *15 = x
x = 17.876
Now round to the nearest foot.
x ≈ 18 ft