I'm pretty sure you are asking for the value of b. Let's actually write it and then solve it:
Solving for b yields:
So, b = 19.59. If you want the answer in simplified radical form, we can also do that:
So, b = 8√6 = 19.59
Solving for b yields:
So, b = 19.59. If you want the answer in simplified radical form, we can also do that:
So, b = 8√6 = 19.59