The answer is at the bottom
For this, you can use the Pythagorean theorem, where:
a^2 + b^2 = c^2
You plug in a = 5.9
And plug in b = 6.9
You should get:
5.9^2 + 6.9^2 = c^2
Now, work out the left side of the problem:
34.81 + 47.61 = c ^2
Add the left side
82.42 = c^2
Remember that you can get rid of the square by taking the square root. So you want to take the square root of both sides to get this:
9.1 = c
This is your answer