Question

The ideal length of a particular metal rod is 30.5 cm. The measured length may vary from the ideal length by at most 0.015 cm. What is the range of acceptable lengths for the rod?

Answer 1

The lowest value in the range of the acceptable lengths of the rod is that which is 0.015 cm shorter than the ideal. The highest value in the range is that which is 0.015 cm longer than the ideal. From the given, the ideal length is 30.5 cm. Thus, the answer is 30.485 cm to 30.30.515 cm.