We can see that this triangle is a right triangle (because it has a right angle inside of it). In right triangles, we know that the Pythagorean Theorem states that a triangle with legs a and b, and hypotenuse c, a² + b² = c². Now let's look at this triangle. We know the value of the two legs, so we can substitute their values into the formula and solve.
8.34² + 14.22² = c²
c² = 271.764
Now we need to take the square root of 271.764. We have to solve for three decimal points (since we have to round to the second, we need to find at least three decimal points). The square root of 271.764 to 3 decimal points is 16.485. Rounding this to two decimal points, 16.49 is our answer (since 5 is greater than or equal to 5).