help me please and show work with number 11

Answer:
He could not have traveled 7 miles in any direction from the wreck. 7 mi would be the radius of the circular area that needs to be searched. So the formula needed is A= pi(r^2)
Step-by-step explanation:
A= pi(r^2)
A = pi (7^2)
A = 153.94 sq mi
Just like that! Easy as pi. ;)