Answer:
3/10
Step-by-step explanation:
There are 20 marbles.  6 of them are blue.
P = 6/20 = 3/10
 
        
                    
             
        
        
        
Answer:
20ft
Explanation:
You multiply the model length by the scale factor to find the actual length. <u>If the scale factor is less than zero, then the actual size will be smaller than the model</u>. Therefore, your answer would be 20ft. 
Specifically, the scale factor is .8 if the actual size is 20ft, 1 if the actual size is 25ft, and 1.2 if the actual size is 30ft.
 
        
             
        
        
        
Step-by-step explanation:
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Answer:
log_3(2x+15)=2  and log_4(-20x+4)=3
Step-by-step explanation:
Plug it in and see!
