The radius would be 9.55, Hope that helps
        
                    
             
        
        
        
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Answer:
The absolute error of the measurement is 0.25 inches
Step-by-step explanation:
we know that
The absolute error of a measurement is equal to one  half the unit of measure. 
In this problem we have
7.5 inches
The measurement is given  by 0.5 inches
So
the absolute error of this  measurement is  
 
Therefore
the exact measurement could be between  
 7.5 (+/-) 0.25 in
That is, between  7.25 in and  7.75 in
 
        
             
        
        
        


<em><u>Solution:</u></em>
<em><u>We have to find the inequalities that are true</u></em>
<em><u>Option 1</u></em>

0.6 is not less than 0
Thus this inequality is not true
<em><u>Option 2</u></em>

0.667 is greater than 0.5
Thus this inequality is true
<em><u>Option 3</u></em>

0.818 is less than 1
Thus this inequality is true
<em><u>Option 4</u></em>

0.5 = 0.5
Thus the above inequality is not true