Answer: C
Step-by-step explanation:
You can solve this by first multiplying both sides of the fraction by the conjugate of the denominator.
In this case, the conjugate is (8 - 2i).
So:

Simplify:

Simplify again, knowing that i^2 = -1

Then, divide both numbers in the numerator by 68 to get your answer.

The answer is C, you can do this by doing FOIL
The value of the tenths place is 8
By the Pythagoras theorem, in a right triangle with the sides being a and b,
a² + b² = Hypotenuse²
Hypotenuse² = 4² + 4²
Hypotenuse² = 16 + 16 = 2*16
Hypotenuse = √2 * √16
Thus, hypotenuse = 4√2