Abby practiced for 55 minutes (60 minutes/12 and *11), Lauren practiced for 40 minutes (60/3 and *2)
Answer:
C)
Step-by-step explanation:
you divide the ratio 
. this give you the increase from old to new. then all you have to do is multiply the original dimensions such as 
and 
. you now have your new dimensions
Let us say that h is the height of the guardrail.
Therefore the inequality equation that we can generate from this scenario is:
| h – 106 | = ± 7
There are two ways to solve this, either the equation is
positive or negative.
When the equation is positive, therefore:
| h – 106 | = 7
h = 7 + 106 = 113 cm
When the equation is negative, therefore:
| h – 106 | = - 7
h = -7 + 106 = 99 cm
So the height must be 99 cm to 113 cm
