## Elementary Technical Mathematics

$48\bar{0},000\ ft$
Using the Pythagorean Theorem, we have: $${a}^2+{b}^2 = {c}^2.$$ Then $$b = \sqrt{c^2-a^2}= \sqrt{521000^2-203000^2}=479824.96\ ft \approx 48\bar{0},000\ ft .$$