Answer:
AB = 9.4
Explanation:
The Pythagoras theorem says that if we have a triangle of side lengths a, b and hypotenuse c is given by

Now in our case, a = 6 and b = 7.2; therefore,


Taking the square root of both sides gives
![c=\sqrt[]{87.84}](https://img.qammunity.org/2023/formulas/mathematics/college/lfq2sgjzcq63znpffkrijv2xruohg8yfmu.png)

rounding to the nearest tenth gives

which is our answer!