Question

What is the equation equivalent to?

Answer 1

I think its equivalent to two

Answer 2

To turn $1.3 \leq h \leq 2.1$ into an absolute value inequality we do the following:
First get the average between 1.3 and 2.1. To do this we add 1.3 to 2.1 and then divide by two. $\frac{1.3 + 2.1}{2} = 1.7$

Now that we have the average we can start to create the absolute inequality 
$1.3 \leq h \leq 2.1$
Insert our average in the middle
$1.3 \leq h - 14 \leq 2.1$
Subtract subtract 1.3 from 1.4  and 1.4 from 2.1 which both will  = 0.4. Now setup your absolute value.
$|h - 1.7| \leq 0.4$