The answer would be 40.
Explanation: if you use the Pythagorean theorem: a^2+ b^2 = c2, you would plug in 14 for c and 6 for a. Giving you
6^2+b^2=14^2
Simplify this and you would get:
36 + b^2 = 196
Subtract 36 from both sides getting you:
B^2= 160
Take the square root of both sides getting you your final answer of:
B= 40.