A machine makes bolts that are 12 mm long. The bolts are considered acceptable if they are within 0.2 mm of 12 mm. What is the longest the bolt can be and still be acceptable? The biggest the bolt can be is 6What is the shortest the bolt can be and still be acceptable?

Answer:  The range of acceptable bolts is from 11.8 mm to 12.2 mm.

If the bolts have to be within 0.2 mm of 12 mm, we simply need to add on and subtract 0.2 from 12 to find the acceptable range.

12 - 0.2 = 11.8 is the lowest value.

12 + 0.2 = 12.2 is the highest value.