So for this, you'll be using the pythagorean theorem, which is 
 . In this case, 10 and 24 are the legs, and AB is the hypotenuse. Our equation will be
 . In this case, 10 and 24 are the legs, and AB is the hypotenuse. Our equation will be 

Firstly, solve the exponents: 

Next, combine 100 and 576: 

And lastly, square root both sides to get 

And in short, Line AB is 26 ft, or the first option.