Its 11 cause I’m built different
        
             
        
        
        
Answer:
D. 3*10^2
Step-by-step explanation:
Given the diameter of human red blood cell =  0.000009 m
diameter of a cold virus = 0.00000003 m
To know how many times as large is the diameter of a red blood cell as the diameter of a cold virus, we will take the ratio of the diameter of human red blood cell to that of a cold virus as shown;
diameter of human red blood cell/diameter of a cold virus = 0.000009 m/0.00000003 m
= 9*10^-6/3*10^-8
= 9/3 * 10^-6-(-8)
= 3 * 10^(-6+8)
= 3*10^2
Hence the diameter of a red blood cell is 3*10^2 larger than that of the cold virus
 
        
             
        
        
        
Answer:
Given:
⇒ \frac{23}{2^2(5)} 
2 
2
 (5)
23
 
 
To Find:
Expansion of the given number = ?
Solution:
⇒ \frac{23}{2^2(5)} 
2 
2
 (5)
23
 
 
By opening the squares, we get
⇒ \frac{23}{2\times 2\times 5} 
2×2×5
23
 
 
⇒ \frac{23}{4\times 5} 
4×5
23
 
 
⇒ \frac{23}{20} 
20
23
 
 
⇒ 1.151.15