P = k/w^2 
<span>first of all you need to find k </span>
<span>But I kind of don't like the units of each value so let say </span>
<span>400KPa = 4 * 10^5 Pa = 4 * 10^5 N/m^2 </span>
<span>2 cm = 2 * 10^-2 m </span>
<span>input values in the equation </span>
<span>4*10^5 = k/(4*10^-4) >>> k = 160 N </span>
<span>P = 160/w^2 </span>
<span>it said if she wears a heel with a width of .5 cm </span>
<span>P = 160(0.5 * 10^-2)^2 >>> P = 6400 KPa</span>
        
             
        
        
        
Answer:
its b or c ( im not for sure tho)
Step-by-step explanation:
 
        
             
        
        
        
I need to see the answers choices so answer
        
             
        
        
        
Answer:
Yes, 500 texts.
Step-by-step explanation:
If you write out the equations, you can just set them up equal to each other and simplify. 
A = .05x + 20
B = .07x + 10
.05x + 20 = .07x + 10  (subtract 10 from both sides)
.05x + 10 = .07x  (subtract .05x from both sides)
10 = .02x  (multiply both sides by 50
x = 500 texts