Answer:
41.67
Step-by-step explanation:
1.) Set up a proprotion
[tex]\frac{5.6}{x}[/tex]=[tex]\frac{20}{x+30}[/tex]
2.) Next solve! Cross multiply.
so we get..
5.6(x+30)= 20x
5.6x+168= 20x
5.6x-20x= -168
x= 11.67
3.) We have found x, but they are asking us for the whole length of AB! So just add 30 to x or 11.67
x+ 30= length of AB
11.67+30= 41.67
There are for the length of AB is 41.67!
