Answer:
14.1 mi
Step-by-step explanation:
Use pythagorean theorem (a^2 + b^2 = c^2)
a = base
b = side
c = hypontenuse
then just plug the numbers into the formula -----> 6.3^2 + b^2 = 15.4^2
then subtract 6.3^2 from both sides ----> b^2 = 15.4^2 - 6.3^2
solve ------> b^2 = 197.47
Square root both sides and you get b = 14.1 mi as your answer
