2 wk --- 38 cm
3.5 wk --- x cm
x =  3.5 wk x 38 cm
       ---------------------
       2 wk
x= 66.5 cm
        
             
        
        
        
Answer:
Expand it. 
(1+2i)^3 is equal to (1+2i)(1+2i)(1+2i). 
Multiply everything out (being sure to multiply <em>every</em> term. (1+2i) * (1+2i) = 1+2i+2i+4i^2. 
i is the square root of negative one, so i^2 is just -1. 1+2i+2i-4 is what you get from the first two, so now simplify that: 
1-4 + 2i+2i = (-3+4i) and now multiply that by (1+2i):
(-3+4i) * (1+2i) = -3 - 6i +4i +8i^2. 
Simplify again, and the answer is: -11-2i
Step-by-step explanation:
I hope this helps - really my only tip is don't spend time thinking about what i is, that just hurts your brain. Just remember that i^2 is equal to negative one, and treat it like regular multiplication and you will be fine.
 
        
             
        
        
        
Answer: Pressure and force are related, and so you can calculate one if you know the other by using the physics equation,
 P = F/A. Because pressure is force divided by area,
 its meter-kilogram-second (MKS) units are newtons per square meter,
 or N/m2.