Answer:
939.41711
Explanation:
using the pythagorean theorem we can find the hypotenuse of a right angle triangle by using a^2 +b^2 = c^2
a and b being the legs of the triangle.
in this case a = 400
and b = 850
square both numbers:
160000 + 722500 = 882500
√882500 = 939.41711