Answer:
c.1,2.3.5.7.11.13.17.19.23.29.31.37.41.43.47.53.59.61.67.71.73.79.83.89.97
d.no for example 9
e.no for example 2
f. 7,1,3,9 
Step-by-step explanation:
 
        
             
        
        
        
Answer:
Here is your answer 
Step-by-step explanation:
50
 
        
             
        
        
        
# of  boys : # of girls
This can be written as 
6:15
6 to 15, or 
6/15
        
             
        
        
        
Use PEMDAS method to execute operations in the following order:
- Parentheses
- Exponents
- Multiplication
- Division
- Addition
- Subtraction
First equation:
12 + (38 - 18)2 = 12 + 20 × 2 = 52
Second equation:
(12)2 - 6(2 - 23) = 24 - 6(-21) = 24 + 126 = 150
Hope this helps.