The ideal length of a particular metal rod is 20.5 cm. The measured length may vary from the ideal length by at most 0.045 cm. What is the range?

*the equal sign is for less than / greater than or equal to*

A) X=20.545

B) 20.455 > = x < = 20.545

C) 20.454 > = x > = 20.545

D) 20.455 < = X < = 20.545

To answer this item, we are first to calculate the values of the length of this particular metal rod that is 0.045 cm less than the given,

Lower limit = 20.5 cm - 0.045 cm = 20.455 cm

Also, we calculate for the upper limit by adding 0.045 cm to the given length.

Upper limit = 20.5 cm + 0.045 cm = 20.545 cm

Thus, the answer to this item is D.