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 rod may be 30.5 +- 0.015
30.5 + 0.015 = 30.515
30.5 - 0.015 = 30.485
The range of acceptable lengths is 30.485 to 30.515 cm

Answer 2

so how would you write the answer