Answer:
A
Step-by-step explanation:
We can use the Pythagorean Theorem:
[tex]a^2+b^2=c^2[/tex], where a and b are the two legs and c is the hypotenuse.
Plug in what we know:
[tex](10)^2+b^2=(12)^2[/tex]
[tex]100+b^2=144[/tex]
[tex]b^2=44[/tex]
[tex]b=\sqrt{44}\approx 6.63\approx7[/tex]
