Were using pythagorean theorem. Help if possible

Answer:
1) 6
2) [tex]\sqrt{15}[/tex]
Step-by-step explanation:
Please let me know if you want me to add an explanation as to why this is the answer. I can definitely do that, I just wouldn’t want to write it if you don’t want me to :)
Answer:
EF= 6 ft
ST= 3.8 yd
Step-by-step explanation:
[tex]c= \sqrt{a^2+b^2} \\[/tex]
[tex]8^2+x^2=10^2[/tex]
64+x= 100
-64 = -64
x= [tex]\sqrt{36}[/tex]
x=6
EF= 6 ft
[tex]x^2+1^2=4^2[/tex]
x+ 1= 16
-1 = -1
x= [tex]\sqrt{15}[/tex]
x= 3.8
ST= 3.8
Hope this helped :)