Answer:
Step-by-step explanation:
1. Substitute p for 5p+4
2. 5p+4-11
3. 5p-7
 
        
             
        
        
        
The red goes into the bottom plane and the blue stays on the top
        
             
        
        
        
To evaluate 

First, we input 0, for theta in the function to obtain:

This is an indeterminate form.
So, we apply L'Hopital's rule by differentiating the numerator and the denominator as follows:
 
        
             
        
        
        
Answer:
21
Step-by-step explanation:
The x intercept is represented by the coordinate (x,0) on x axis. 
So, to find the x intercept ,we need to equate y=0 in the equation 20x+70y=420
=> 20x+ 70*0=420
=> x=420/20 =21.
x intercept is (21,0).