What is the geometric mean of 7 and 13?

i got up to this step but i don't understand what it's telling me to do in the last step.

  √91 ≈ 9.5394

Step-by-step explanation:

Take the square root of 91 to find the value of x. There is no simpler radical form. You can write it as ...

  x = √91 . . . . . . . simplest radical form

or as

  x ≈ 9.5394 . . . . an approximation of the irrational root

i get you, what you should do is think of the positive things that would come out of it. it will make yours parents proud and raise your grade. you should always try and if you can't focus tell the teacher.

6e14 is the answer.