Answer:
89.44
Step-by-step explanation:
[tex]We\:can\:use\:Pythagorean\:theorem\\\\a^2+b^2=c^2\\\\with\\\\a=?\\\\b=80\\\\c=120\\\\\Rrightarrow (?)^2+(80)^2=(120)^2\\\\?^2=(120-80)(120+80)\\\\?^2=(40)(200)\\\\?^2=8000\\\\?=\sqrt{(2^3)(10^3)}\\\\?=20\sqrt{20}\\\\?=40\sqrt{5}\\\\?\approx 89.44[/tex]
