Solve.The radius r of a plastic tube used in manufacturing a child's toy must not differ from the standard s by more than 6 millimeters. The manufacturing engineers express this as 
Find the limits of r if the standard s is 37.
A. 31 ? r ? 43
B. 25 ? r ? 31
C. r ? 25 or r ? 31
D. r ? 31 or r ? 43
Answer: A
Mathematics
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A. - 
B. - 
C. 
D. 
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Add the integers.44 + 31
A. 77
B. 75
C.
| 76? |
D. 74
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