Answer:
oh cool good luck
Step-by-step explanation:
x2=400
x=√400
=20
20^2=400
a = 23.588
a^2 = 17 1/3^2 + 16^2
a^2 = 300.4 + 256
a^2 = 556.4
a = 23.588 (I rounded to thousandths but you can round to whatever)